Home / 128,939.04-177,935.40-72,350.28

Finding the Fourth Proportional to 128,939.04, 177,935.40 and 72,350.28

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Solution

The fourth proportional to 128,939.04, 177,935.40 and 72,350.28 is: 99,843.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,939.04 : 177,935.40 = 72,350.28 : x
  2. Step 2: Convert to fraction form
    128,939.04/177,935.40 = 72,350.28/x
  3. Step 3: Cross multiply
    128,939.04x = 177,935.40 × 72,350.28
  4. Step 4: Simplify right side
    128,939.04x = 12,873,676,011.91
  5. Step 5: Solve for x
    x = 12,873,676,011.91/128,939.04
  6. Step 6: Final answer
    x = 99,843.12

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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.