Home / 138,154,646.45-190,670,130.27-78,630,415.01

Finding the Fourth Proportional to 138,154,646.45, 190,670,130.27 and 78,630,415.01

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Solution

The fourth proportional to 138,154,646.45, 190,670,130.27 and 78,630,415.01 is: 108,519,487.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,154,646.45 : 190,670,130.27 = 78,630,415.01 : x
  2. Step 2: Convert to fraction form
    138,154,646.45/190,670,130.27 = 78,630,415.01/x
  3. Step 3: Cross multiply
    138,154,646.45x = 190,670,130.27 × 78,630,415.01
  4. Step 4: Simplify right side
    138,154,646.45x = 14,992,471,473,617,540
  5. Step 5: Solve for x
    x = 14,992,471,473,617,540/138,154,646.45
  6. Step 6: Final answer
    x = 108,519,487.83

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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.