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Finding the Fourth Proportional to 72,221.42, 99,692.95 and 64,654.17

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Solution

The fourth proportional to 72,221.42, 99,692.95 and 64,654.17 is: 89,247.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,221.42 : 99,692.95 = 64,654.17 : x
  2. Step 2: Convert to fraction form
    72,221.42/99,692.95 = 64,654.17/x
  3. Step 3: Cross multiply
    72,221.42x = 99,692.95 × 64,654.17
  4. Step 4: Simplify right side
    72,221.42x = 6,445,565,545.84
  5. Step 5: Solve for x
    x = 6,445,565,545.84/72,221.42
  6. Step 6: Final answer
    x = 89,247.28

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1.5x scale

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.