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Finding the Fourth Proportional to 90,666.90, 136,109.70 and 90,010.80

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Solution

The fourth proportional to 90,666.90, 136,109.70 and 90,010.80 is: 135,124.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,666.90 : 136,109.70 = 90,010.80 : x
  2. Step 2: Convert to fraction form
    90,666.90/136,109.70 = 90,010.80/x
  3. Step 3: Cross multiply
    90,666.90x = 136,109.70 × 90,010.80
  4. Step 4: Simplify right side
    90,666.90x = 12,251,342,984.76
  5. Step 5: Solve for x
    x = 12,251,342,984.76/90,666.90
  6. Step 6: Final answer
    x = 135,124.76

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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.