Home / 128,028.13-176,678.85-71,439.46

Finding the Fourth Proportional to 128,028.13, 176,678.85 and 71,439.46

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Solution

The fourth proportional to 128,028.13, 176,678.85 and 71,439.46 is: 98,586.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,028.13 : 176,678.85 = 71,439.46 : x
  2. Step 2: Convert to fraction form
    128,028.13/176,678.85 = 71,439.46/x
  3. Step 3: Cross multiply
    128,028.13x = 176,678.85 × 71,439.46
  4. Step 4: Simplify right side
    128,028.13x = 12,621,841,637.42
  5. Step 5: Solve for x
    x = 12,621,841,637.42/128,028.13
  6. Step 6: Final answer
    x = 98,586.47

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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.