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Finding the Fourth Proportional to 225,148.50, 310,721.76 and 128,354.67

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Solution

The fourth proportional to 225,148.50, 310,721.76 and 128,354.67 is: 177,139.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,148.50 : 310,721.76 = 128,354.67 : x
  2. Step 2: Convert to fraction form
    225,148.50/310,721.76 = 128,354.67/x
  3. Step 3: Cross multiply
    225,148.50x = 310,721.76 × 128,354.67
  4. Step 4: Simplify right side
    225,148.50x = 39,882,588,966.62
  5. Step 5: Solve for x
    x = 39,882,588,966.62/225,148.50
  6. Step 6: Final answer
    x = 177,139.04

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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.