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Finding the Fourth Proportional to 287,639.06, 431,364.70 and 95,461.88

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Solution

The fourth proportional to 287,639.06, 431,364.70 and 95,461.88 is: 143,161.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,639.06 : 431,364.70 = 95,461.88 : x
  2. Step 2: Convert to fraction form
    287,639.06/431,364.70 = 95,461.88/x
  3. Step 3: Cross multiply
    287,639.06x = 431,364.70 × 95,461.88
  4. Step 4: Simplify right side
    287,639.06x = 41,178,885,227.64
  5. Step 5: Solve for x
    x = 41,178,885,227.64/287,639.06
  6. Step 6: Final answer
    x = 143,161.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.