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Finding the Fourth Proportional to 153,248.68, 211,479.06 and 85,265.74

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Solution

The fourth proportional to 153,248.68, 211,479.06 and 85,265.74 is: 117,664.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,248.68 : 211,479.06 = 85,265.74 : x
  2. Step 2: Convert to fraction form
    153,248.68/211,479.06 = 85,265.74/x
  3. Step 3: Cross multiply
    153,248.68x = 211,479.06 × 85,265.74
  4. Step 4: Simplify right side
    153,248.68x = 18,031,918,545.40
  5. Step 5: Solve for x
    x = 18,031,918,545.40/153,248.68
  6. Step 6: Final answer
    x = 117,664.43

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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.