Home / 128,818.16-177,772.56-72,228.32

Finding the Fourth Proportional to 128,818.16, 177,772.56 and 72,228.32

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Solution

The fourth proportional to 128,818.16, 177,772.56 and 72,228.32 is: 99,677.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,818.16 : 177,772.56 = 72,228.32 : x
  2. Step 2: Convert to fraction form
    128,818.16/177,772.56 = 72,228.32/x
  3. Step 3: Cross multiply
    128,818.16x = 177,772.56 × 72,228.32
  4. Step 4: Simplify right side
    128,818.16x = 12,840,213,350.90
  5. Step 5: Solve for x
    x = 12,840,213,350.90/128,818.16
  6. Step 6: Final answer
    x = 99,677.04

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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.