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Finding the Fourth Proportional to 153,384.68, 211,638.20 and 89,710.04

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Solution

The fourth proportional to 153,384.68, 211,638.20 and 89,710.04 is: 123,780.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,384.68 : 211,638.20 = 89,710.04 : x
  2. Step 2: Convert to fraction form
    153,384.68/211,638.20 = 89,710.04/x
  3. Step 3: Cross multiply
    153,384.68x = 211,638.20 × 89,710.04
  4. Step 4: Simplify right side
    153,384.68x = 18,986,071,387.53
  5. Step 5: Solve for x
    x = 18,986,071,387.53/153,384.68
  6. Step 6: Final answer
    x = 123,780.75

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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.