Home / 128,017.01-176,663.48-71,428.38

Finding the Fourth Proportional to 128,017.01, 176,663.48 and 71,428.38

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Solution

The fourth proportional to 128,017.01, 176,663.48 and 71,428.38 is: 98,571.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,017.01 : 176,663.48 = 71,428.38 : x
  2. Step 2: Convert to fraction form
    128,017.01/176,663.48 = 71,428.38/x
  3. Step 3: Cross multiply
    128,017.01x = 176,663.48 × 71,428.38
  4. Step 4: Simplify right side
    128,017.01x = 12,618,785,824.42
  5. Step 5: Solve for x
    x = 12,618,785,824.42/128,017.01
  6. Step 6: Final answer
    x = 98,571.17

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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.