Home / 129,157,678.47-178,238,987.42-70,419,864.27

Finding the Fourth Proportional to 129,157,678.47, 178,238,987.42 and 70,419,864.27

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Solution

The fourth proportional to 129,157,678.47, 178,238,987.42 and 70,419,864.27 is: 97,180,171.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,157,678.47 : 178,238,987.42 = 70,419,864.27 : x
  2. Step 2: Convert to fraction form
    129,157,678.47/178,238,987.42 = 70,419,864.27/x
  3. Step 3: Cross multiply
    129,157,678.47x = 178,238,987.42 × 70,419,864.27
  4. Step 4: Simplify right side
    129,157,678.47x = 12,551,565,301,386,536
  5. Step 5: Solve for x
    x = 12,551,565,301,386,536/129,157,678.47
  6. Step 6: Final answer
    x = 97,180,171.17

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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.