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Finding the Fourth Proportional to 72,983,894.89, 100,718,041.86 and 39,493,374.28

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Solution

The fourth proportional to 72,983,894.89, 100,718,041.86 and 39,493,374.28 is: 54,501,000.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,983,894.89 : 100,718,041.86 = 39,493,374.28 : x
  2. Step 2: Convert to fraction form
    72,983,894.89/100,718,041.86 = 39,493,374.28/x
  3. Step 3: Cross multiply
    72,983,894.89x = 100,718,041.86 × 39,493,374.28
  4. Step 4: Simplify right side
    72,983,894.89x = 3,977,695,323,925,687.50
  5. Step 5: Solve for x
    x = 3,977,695,323,925,687.50/72,983,894.89
  6. Step 6: Final answer
    x = 54,501,000.94

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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.