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Finding the Fourth Proportional to 72,133.64, 99,572.19 and 64,566.62

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Solution

The fourth proportional to 72,133.64, 99,572.19 and 64,566.62 is: 89,126.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,133.64 : 99,572.19 = 64,566.62 : x
  2. Step 2: Convert to fraction form
    72,133.64/99,572.19 = 64,566.62/x
  3. Step 3: Cross multiply
    72,133.64x = 99,572.19 × 64,566.62
  4. Step 4: Simplify right side
    72,133.64x = 6,429,039,256.44
  5. Step 5: Solve for x
    x = 6,429,039,256.44/72,133.64
  6. Step 6: Final answer
    x = 89,126.79

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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.