Home / 129,378,634.56-178,545,001.65-70,643,627.61

Finding the Fourth Proportional to 129,378,634.56, 178,545,001.65 and 70,643,627.61

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Solution

The fourth proportional to 129,378,634.56, 178,545,001.65 and 70,643,627.61 is: 97,489,563.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,378,634.56 : 178,545,001.65 = 70,643,627.61 : x
  2. Step 2: Convert to fraction form
    129,378,634.56/178,545,001.65 = 70,643,627.61/x
  3. Step 3: Cross multiply
    129,378,634.56x = 178,545,001.65 × 70,643,627.61
  4. Step 4: Simplify right side
    129,378,634.56x = 12,613,066,608,189,436
  5. Step 5: Solve for x
    x = 12,613,066,608,189,436/129,378,634.56
  6. Step 6: Final answer
    x = 97,489,563.49

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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.