Home / 128,083.47-176,754.51-74,381.69

Finding the Fourth Proportional to 128,083.47, 176,754.51 and 74,381.69

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Solution

The fourth proportional to 128,083.47, 176,754.51 and 74,381.69 is: 102,646.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,083.47 : 176,754.51 = 74,381.69 : x
  2. Step 2: Convert to fraction form
    128,083.47/176,754.51 = 74,381.69/x
  3. Step 3: Cross multiply
    128,083.47x = 176,754.51 × 74,381.69
  4. Step 4: Simplify right side
    128,083.47x = 13,147,298,285.15
  5. Step 5: Solve for x
    x = 13,147,298,285.15/128,083.47
  6. Step 6: Final answer
    x = 102,646.33

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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.