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Finding the Fourth Proportional to 64,428, 88,920.36 and 39,292.08

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Solution

The fourth proportional to 64,428, 88,920.36 and 39,292.08 is: 54,229.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,428 : 88,920.36 = 39,292.08 : x
  2. Step 2: Convert to fraction form
    64,428/88,920.36 = 39,292.08/x
  3. Step 3: Cross multiply
    64,428x = 88,920.36 × 39,292.08
  4. Step 4: Simplify right side
    64,428x = 3,493,865,898.75
  5. Step 5: Solve for x
    x = 3,493,865,898.75/64,428
  6. Step 6: Final answer
    x = 54,229.00

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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.