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Finding the Fourth Proportional to 98,651.70, 147,977.55 and 90,486.90

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Solution

The fourth proportional to 98,651.70, 147,977.55 and 90,486.90 is: 135,730.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,651.70 : 147,977.55 = 90,486.90 : x
  2. Step 2: Convert to fraction form
    98,651.70/147,977.55 = 90,486.90/x
  3. Step 3: Cross multiply
    98,651.70x = 147,977.55 × 90,486.90
  4. Step 4: Simplify right side
    98,651.70x = 13,390,029,769.10
  5. Step 5: Solve for x
    x = 13,390,029,769.10/98,651.70
  6. Step 6: Final answer
    x = 135,730.35

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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.