Home / 138,049,060.80-190,511,692.08-76,173,384.96

Finding the Fourth Proportional to 138,049,060.80, 190,511,692.08 and 76,173,384.96

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Solution

The fourth proportional to 138,049,060.80, 190,511,692.08 and 76,173,384.96 is: 105,121,471.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,049,060.80 : 190,511,692.08 = 76,173,384.96 : x
  2. Step 2: Convert to fraction form
    138,049,060.80/190,511,692.08 = 76,173,384.96/x
  3. Step 3: Cross multiply
    138,049,060.80x = 190,511,692.08 × 76,173,384.96
  4. Step 4: Simplify right side
    138,049,060.80x = 14,511,920,460,190,822
  5. Step 5: Solve for x
    x = 14,511,920,460,190,822/138,049,060.80
  6. Step 6: Final answer
    x = 105,121,471.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.