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Finding the Fourth Proportional to 70,785.61, 97,681.24 and 40,549.88

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Solution

The fourth proportional to 70,785.61, 97,681.24 and 40,549.88 is: 55,957.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,785.61 : 97,681.24 = 40,549.88 : x
  2. Step 2: Convert to fraction form
    70,785.61/97,681.24 = 40,549.88/x
  3. Step 3: Cross multiply
    70,785.61x = 97,681.24 × 40,549.88
  4. Step 4: Simplify right side
    70,785.61x = 3,960,962,560.25
  5. Step 5: Solve for x
    x = 3,960,962,560.25/70,785.61
  6. Step 6: Final answer
    x = 55,957.17

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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.