Home / 145,087.20-200,217.24-81,445.68

Finding the Fourth Proportional to 145,087.20, 200,217.24 and 81,445.68

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Solution

The fourth proportional to 145,087.20, 200,217.24 and 81,445.68 is: 112,393.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,087.20 : 200,217.24 = 81,445.68 : x
  2. Step 2: Convert to fraction form
    145,087.20/200,217.24 = 81,445.68/x
  3. Step 3: Cross multiply
    145,087.20x = 200,217.24 × 81,445.68
  4. Step 4: Simplify right side
    145,087.20x = 16,306,829,259.52
  5. Step 5: Solve for x
    x = 16,306,829,259.52/145,087.20
  6. Step 6: Final answer
    x = 112,393.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.