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Finding the Fourth Proportional to 112,655.40, 168,983.10 and 75,330.60

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Solution

The fourth proportional to 112,655.40, 168,983.10 and 75,330.60 is: 112,995.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,655.40 : 168,983.10 = 75,330.60 : x
  2. Step 2: Convert to fraction form
    112,655.40/168,983.10 = 75,330.60/x
  3. Step 3: Cross multiply
    112,655.40x = 168,983.10 × 75,330.60
  4. Step 4: Simplify right side
    112,655.40x = 12,729,598,312.86
  5. Step 5: Solve for x
    x = 12,729,598,312.86/112,655.40
  6. Step 6: Final answer
    x = 112,995.90

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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.