Home / 72,807,139.20-109,210,708.80-20,991,641.70

Finding the Fourth Proportional to 72,807,139.20, 109,210,708.80 and 20,991,641.70

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Solution

The fourth proportional to 72,807,139.20, 109,210,708.80 and 20,991,641.70 is: 31,487,462.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,807,139.20 : 109,210,708.80 = 20,991,641.70 : x
  2. Step 2: Convert to fraction form
    72,807,139.20/109,210,708.80 = 20,991,641.70/x
  3. Step 3: Cross multiply
    72,807,139.20x = 109,210,708.80 × 20,991,641.70
  4. Step 4: Simplify right side
    72,807,139.20x = 2,292,512,068,932,637
  5. Step 5: Solve for x
    x = 2,292,512,068,932,637/72,807,139.20
  6. Step 6: Final answer
    x = 31,487,462.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.