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Finding the Fourth Proportional to 268,484.70, 402,699.33 and 90,987.12

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Solution

The fourth proportional to 268,484.70, 402,699.33 and 90,987.12 is: 136,471.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,484.70 : 402,699.33 = 90,987.12 : x
  2. Step 2: Convert to fraction form
    268,484.70/402,699.33 = 90,987.12/x
  3. Step 3: Cross multiply
    268,484.70x = 402,699.33 × 90,987.12
  4. Step 4: Simplify right side
    268,484.70x = 36,640,452,262.63
  5. Step 5: Solve for x
    x = 36,640,452,262.63/268,484.70
  6. Step 6: Final answer
    x = 136,471.29

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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.