Home / 128,437.25-177,279.03-74,732.67

Finding the Fourth Proportional to 128,437.25, 177,279.03 and 74,732.67

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Solution

The fourth proportional to 128,437.25, 177,279.03 and 74,732.67 is: 103,151.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,437.25 : 177,279.03 = 74,732.67 : x
  2. Step 2: Convert to fraction form
    128,437.25/177,279.03 = 74,732.67/x
  3. Step 3: Cross multiply
    128,437.25x = 177,279.03 × 74,732.67
  4. Step 4: Simplify right side
    128,437.25x = 13,248,535,246.91
  5. Step 5: Solve for x
    x = 13,248,535,246.91/128,437.25
  6. Step 6: Final answer
    x = 103,151.82

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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.