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Finding the Fourth Proportional to 144,931.80, 217,397.70 and 61,987.80

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Solution

The fourth proportional to 144,931.80, 217,397.70 and 61,987.80 is: 92,981.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,931.80 : 217,397.70 = 61,987.80 : x
  2. Step 2: Convert to fraction form
    144,931.80/217,397.70 = 61,987.80/x
  3. Step 3: Cross multiply
    144,931.80x = 217,397.70 × 61,987.80
  4. Step 4: Simplify right side
    144,931.80x = 13,476,005,148.06
  5. Step 5: Solve for x
    x = 13,476,005,148.06/144,931.80
  6. Step 6: Final answer
    x = 92,981.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.