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Finding the Fourth Proportional to 64,569, 89,110.08 and 39,423.36

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Solution

The fourth proportional to 64,569, 89,110.08 and 39,423.36 is: 54,407.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,569 : 89,110.08 = 39,423.36 : x
  2. Step 2: Convert to fraction form
    64,569/89,110.08 = 39,423.36/x
  3. Step 3: Cross multiply
    64,569x = 89,110.08 × 39,423.36
  4. Step 4: Simplify right side
    64,569x = 3,513,018,763.47
  5. Step 5: Solve for x
    x = 3,513,018,763.47/64,569
  6. Step 6: Final answer
    x = 54,407.20

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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.