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Finding the Fourth Proportional to 203,275.47, 280,516.47 and 112,631.11

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Solution

The fourth proportional to 203,275.47, 280,516.47 and 112,631.11 is: 155,428.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,275.47 : 280,516.47 = 112,631.11 : x
  2. Step 2: Convert to fraction form
    203,275.47/280,516.47 = 112,631.11/x
  3. Step 3: Cross multiply
    203,275.47x = 280,516.47 × 112,631.11
  4. Step 4: Simplify right side
    203,275.47x = 31,594,880,265.72
  5. Step 5: Solve for x
    x = 31,594,880,265.72/203,275.47
  6. Step 6: Final answer
    x = 155,428.89

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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.