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Finding the Fourth Proportional to 97,205.70, 145,808.55 and 90,207.30

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Solution

The fourth proportional to 97,205.70, 145,808.55 and 90,207.30 is: 135,310.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    97,205.70 : 145,808.55 = 90,207.30 : x
  2. Step 2: Convert to fraction form
    97,205.70/145,808.55 = 90,207.30/x
  3. Step 3: Cross multiply
    97,205.70x = 145,808.55 × 90,207.30
  4. Step 4: Simplify right side
    97,205.70x = 13,152,995,612.42
  5. Step 5: Solve for x
    x = 13,152,995,612.42/97,205.70
  6. Step 6: Final answer
    x = 135,310.95

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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.