Home / 128,395.28-177,111.24-77,373.20

Finding the Fourth Proportional to 128,395.28, 177,111.24 and 77,373.20

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Solution

The fourth proportional to 128,395.28, 177,111.24 and 77,373.20 is: 106,730.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,395.28 : 177,111.24 = 77,373.20 : x
  2. Step 2: Convert to fraction form
    128,395.28/177,111.24 = 77,373.20/x
  3. Step 3: Cross multiply
    128,395.28x = 177,111.24 × 77,373.20
  4. Step 4: Simplify right side
    128,395.28x = 13,703,663,394.77
  5. Step 5: Solve for x
    x = 13,703,663,394.77/128,395.28
  6. Step 6: Final answer
    x = 106,730.27

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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.