Home / 128,128.56-176,819.76-74,394

Finding the Fourth Proportional to 128,128.56, 176,819.76 and 74,394

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Solution

The fourth proportional to 128,128.56, 176,819.76 and 74,394 is: 102,665.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,128.56 : 176,819.76 = 74,394 : x
  2. Step 2: Convert to fraction form
    128,128.56/176,819.76 = 74,394/x
  3. Step 3: Cross multiply
    128,128.56x = 176,819.76 × 74,394
  4. Step 4: Simplify right side
    128,128.56x = 13,154,329,225.44
  5. Step 5: Solve for x
    x = 13,154,329,225.44/128,128.56
  6. Step 6: Final answer
    x = 102,665.08

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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.