Home / 128,447.04-177,260.40-71,857.92

Finding the Fourth Proportional to 128,447.04, 177,260.40 and 71,857.92

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Solution

The fourth proportional to 128,447.04, 177,260.40 and 71,857.92 is: 99,165.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,447.04 : 177,260.40 = 71,857.92 : x
  2. Step 2: Convert to fraction form
    128,447.04/177,260.40 = 71,857.92/x
  3. Step 3: Cross multiply
    128,447.04x = 177,260.40 × 71,857.92
  4. Step 4: Simplify right side
    128,447.04x = 12,737,563,642.37
  5. Step 5: Solve for x
    x = 12,737,563,642.37/128,447.04
  6. Step 6: Final answer
    x = 99,165.88

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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.