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Finding the Fourth Proportional to 203,311.96, 280,547.72 and 112,645.28

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Solution

The fourth proportional to 203,311.96, 280,547.72 and 112,645.28 is: 155,437.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,311.96 : 280,547.72 = 112,645.28 : x
  2. Step 2: Convert to fraction form
    203,311.96/280,547.72 = 112,645.28/x
  3. Step 3: Cross multiply
    203,311.96x = 280,547.72 × 112,645.28
  4. Step 4: Simplify right side
    203,311.96x = 31,602,376,472.76
  5. Step 5: Solve for x
    x = 31,602,376,472.76/203,311.96
  6. Step 6: Final answer
    x = 155,437.86

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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.