Home / 72,726,508.80-100,364,720.90-39,688,896.78

Finding the Fourth Proportional to 72,726,508.80, 100,364,720.90 and 39,688,896.78

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Solution

The fourth proportional to 72,726,508.80, 100,364,720.90 and 39,688,896.78 is: 54,771,844.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,726,508.80 : 100,364,720.90 = 39,688,896.78 : x
  2. Step 2: Convert to fraction form
    72,726,508.80/100,364,720.90 = 39,688,896.78/x
  3. Step 3: Cross multiply
    72,726,508.80x = 100,364,720.90 × 39,688,896.78
  4. Step 4: Simplify right side
    72,726,508.80x = 3,983,365,047,955,164
  5. Step 5: Solve for x
    x = 3,983,365,047,955,164/72,726,508.80
  6. Step 6: Final answer
    x = 54,771,844.73

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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.