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Finding the Fourth Proportional to 64,168.71, 88,587.78 and 38,681.65

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Solution

The fourth proportional to 64,168.71, 88,587.78 and 38,681.65 is: 53,401.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,168.71 : 88,587.78 = 38,681.65 : x
  2. Step 2: Convert to fraction form
    64,168.71/88,587.78 = 38,681.65/x
  3. Step 3: Cross multiply
    64,168.71x = 88,587.78 × 38,681.65
  4. Step 4: Simplify right side
    64,168.71x = 3,426,721,465.92
  5. Step 5: Solve for x
    x = 3,426,721,465.92/64,168.71
  6. Step 6: Final answer
    x = 53,401.75

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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.