Home / 138,506.80-191,156.22-78,089.08

Finding the Fourth Proportional to 138,506.80, 191,156.22 and 78,089.08

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Solution

The fourth proportional to 138,506.80, 191,156.22 and 78,089.08 is: 107,772.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,506.80 : 191,156.22 = 78,089.08 : x
  2. Step 2: Convert to fraction form
    138,506.80/191,156.22 = 78,089.08/x
  3. Step 3: Cross multiply
    138,506.80x = 191,156.22 × 78,089.08
  4. Step 4: Simplify right side
    138,506.80x = 14,927,213,356.08
  5. Step 5: Solve for x
    x = 14,927,213,356.08/138,506.80
  6. Step 6: Final answer
    x = 107,772.42

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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.