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Finding the Fourth Proportional to 226,854.64, 312,988.90 and 128,721.76

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Solution

The fourth proportional to 226,854.64, 312,988.90 and 128,721.76 is: 177,596.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    226,854.64 : 312,988.90 = 128,721.76 : x
  2. Step 2: Convert to fraction form
    226,854.64/312,988.90 = 128,721.76/x
  3. Step 3: Cross multiply
    226,854.64x = 312,988.90 × 128,721.76
  4. Step 4: Simplify right side
    226,854.64x = 40,288,482,068.46
  5. Step 5: Solve for x
    x = 40,288,482,068.46/226,854.64
  6. Step 6: Final answer
    x = 177,596.02

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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.