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Finding the Fourth Proportional to 72,598, 99,874.20 and 69,487.60

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Solution

The fourth proportional to 72,598, 99,874.20 and 69,487.60 is: 95,595.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,598 : 99,874.20 = 69,487.60 : x
  2. Step 2: Convert to fraction form
    72,598/99,874.20 = 69,487.60/x
  3. Step 3: Cross multiply
    72,598x = 99,874.20 × 69,487.60
  4. Step 4: Simplify right side
    72,598x = 6,940,018,459.92
  5. Step 5: Solve for x
    x = 6,940,018,459.92/72,598
  6. Step 6: Final answer
    x = 95,595.17

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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.