Home / 129,572,141.76-178,811,680.80-77,365,739.52

Finding the Fourth Proportional to 129,572,141.76, 178,811,680.80 and 77,365,739.52

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Solution

The fourth proportional to 129,572,141.76, 178,811,680.80 and 77,365,739.52 is: 106,765,989.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,572,141.76 : 178,811,680.80 = 77,365,739.52 : x
  2. Step 2: Convert to fraction form
    129,572,141.76/178,811,680.80 = 77,365,739.52/x
  3. Step 3: Cross multiply
    129,572,141.76x = 178,811,680.80 × 77,365,739.52
  4. Step 4: Simplify right side
    129,572,141.76x = 13,833,897,919,906,186
  5. Step 5: Solve for x
    x = 13,833,897,919,906,186/129,572,141.76
  6. Step 6: Final answer
    x = 106,765,989.45

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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.