Home / 90,641.40-135,962.10-89,985.30

Finding the Fourth Proportional to 90,641.40, 135,962.10 and 89,985.30

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Solution

The fourth proportional to 90,641.40, 135,962.10 and 89,985.30 is: 134,977.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,641.40 : 135,962.10 = 89,985.30 : x
  2. Step 2: Convert to fraction form
    90,641.40/135,962.10 = 89,985.30/x
  3. Step 3: Cross multiply
    90,641.40x = 135,962.10 × 89,985.30
  4. Step 4: Simplify right side
    90,641.40x = 12,234,590,357.13
  5. Step 5: Solve for x
    x = 12,234,590,357.13/90,641.40
  6. Step 6: Final answer
    x = 134,977.95

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Similar ratio
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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.