Home / 90,979.20-136,468.80-59,486.40

Finding the Fourth Proportional to 90,979.20, 136,468.80 and 59,486.40

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Solution

The fourth proportional to 90,979.20, 136,468.80 and 59,486.40 is: 89,229.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,979.20 : 136,468.80 = 59,486.40 : x
  2. Step 2: Convert to fraction form
    90,979.20/136,468.80 = 59,486.40/x
  3. Step 3: Cross multiply
    90,979.20x = 136,468.80 × 59,486.40
  4. Step 4: Simplify right side
    90,979.20x = 8,118,037,624.32
  5. Step 5: Solve for x
    x = 8,118,037,624.32/90,979.20
  6. Step 6: Final answer
    x = 89,229.60

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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.