Home / 128,687.52-177,596.04-72,117.12

Finding the Fourth Proportional to 128,687.52, 177,596.04 and 72,117.12

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Solution

The fourth proportional to 128,687.52, 177,596.04 and 72,117.12 is: 99,525.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,687.52 : 177,596.04 = 72,117.12 : x
  2. Step 2: Convert to fraction form
    128,687.52/177,596.04 = 72,117.12/x
  3. Step 3: Cross multiply
    128,687.52x = 177,596.04 × 72,117.12
  4. Step 4: Simplify right side
    128,687.52x = 12,807,714,928.20
  5. Step 5: Solve for x
    x = 12,807,714,928.20/128,687.52
  6. Step 6: Final answer
    x = 99,525.70

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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.