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Finding the Fourth Proportional to 90,153.06, 135,248.90 and 26,978.06

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Solution

The fourth proportional to 90,153.06, 135,248.90 and 26,978.06 is: 40,472.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,153.06 : 135,248.90 = 26,978.06 : x
  2. Step 2: Convert to fraction form
    90,153.06/135,248.90 = 26,978.06/x
  3. Step 3: Cross multiply
    90,153.06x = 135,248.90 × 26,978.06
  4. Step 4: Simplify right side
    90,153.06x = 3,648,752,128.00
  5. Step 5: Solve for x
    x = 3,648,752,128.00/90,153.06
  6. Step 6: Final answer
    x = 40,472.86

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1.5x scale

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.