Home / 128,003.32-176,644.29-74,319.76

Finding the Fourth Proportional to 128,003.32, 176,644.29 and 74,319.76

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Solution

The fourth proportional to 128,003.32, 176,644.29 and 74,319.76 is: 102,561.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,003.32 : 176,644.29 = 74,319.76 : x
  2. Step 2: Convert to fraction form
    128,003.32/176,644.29 = 74,319.76/x
  3. Step 3: Cross multiply
    128,003.32x = 176,644.29 × 74,319.76
  4. Step 4: Simplify right side
    128,003.32x = 13,128,161,238.17
  5. Step 5: Solve for x
    x = 13,128,161,238.17/128,003.32
  6. Step 6: Final answer
    x = 102,561.10

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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.