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Finding the Fourth Proportional to 89,897.40, 134,991.90 and 60,445.80

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Solution

The fourth proportional to 89,897.40, 134,991.90 and 60,445.80 is: 90,766.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,897.40 : 134,991.90 = 60,445.80 : x
  2. Step 2: Convert to fraction form
    89,897.40/134,991.90 = 60,445.80/x
  3. Step 3: Cross multiply
    89,897.40x = 134,991.90 × 60,445.80
  4. Step 4: Simplify right side
    89,897.40x = 8,159,693,389.02
  5. Step 5: Solve for x
    x = 8,159,693,389.02/89,897.40
  6. Step 6: Final answer
    x = 90,766.73

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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.