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Finding the Fourth Proportional to 124,761.60, 186,775.20 and 77,872.32

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Solution

The fourth proportional to 124,761.60, 186,775.20 and 77,872.32 is: 116,579.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,761.60 : 186,775.20 = 77,872.32 : x
  2. Step 2: Convert to fraction form
    124,761.60/186,775.20 = 77,872.32/x
  3. Step 3: Cross multiply
    124,761.60x = 186,775.20 × 77,872.32
  4. Step 4: Simplify right side
    124,761.60x = 14,544,618,142.46
  5. Step 5: Solve for x
    x = 14,544,618,142.46/124,761.60
  6. Step 6: Final answer
    x = 116,579.29

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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.