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Finding the Fourth Proportional to 359,875.20, 539,812.80 and 123,139.20

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Solution

The fourth proportional to 359,875.20, 539,812.80 and 123,139.20 is: 184,708.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,875.20 : 539,812.80 = 123,139.20 : x
  2. Step 2: Convert to fraction form
    359,875.20/539,812.80 = 123,139.20/x
  3. Step 3: Cross multiply
    359,875.20x = 539,812.80 × 123,139.20
  4. Step 4: Simplify right side
    359,875.20x = 66,472,116,341.76
  5. Step 5: Solve for x
    x = 66,472,116,341.76/359,875.20
  6. Step 6: Final answer
    x = 184,708.80

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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.