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Finding the Fourth Proportional to 72,619,356.80, 108,817,060.80 and 62,989,558.40

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Solution

The fourth proportional to 72,619,356.80, 108,817,060.80 and 62,989,558.40 is: 94,387,211.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,619,356.80 : 108,817,060.80 = 62,989,558.40 : x
  2. Step 2: Convert to fraction form
    72,619,356.80/108,817,060.80 = 62,989,558.40/x
  3. Step 3: Cross multiply
    72,619,356.80x = 108,817,060.80 × 62,989,558.40
  4. Step 4: Simplify right side
    72,619,356.80x = 6,854,338,606,177,950
  5. Step 5: Solve for x
    x = 6,854,338,606,177,950/72,619,356.80
  6. Step 6: Final answer
    x = 94,387,211.73

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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.