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Finding the Fourth Proportional to 83,730.80, 125,887.80 and 70,900.40

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Solution

The fourth proportional to 83,730.80, 125,887.80 and 70,900.40 is: 106,597.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,730.80 : 125,887.80 = 70,900.40 : x
  2. Step 2: Convert to fraction form
    83,730.80/125,887.80 = 70,900.40/x
  3. Step 3: Cross multiply
    83,730.80x = 125,887.80 × 70,900.40
  4. Step 4: Simplify right side
    83,730.80x = 8,925,495,375.12
  5. Step 5: Solve for x
    x = 8,925,495,375.12/83,730.80
  6. Step 6: Final answer
    x = 106,597.52

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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.