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Finding the Fourth Proportional to 287,616.36, 431,425.50 and 87,935.96

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Solution

The fourth proportional to 287,616.36, 431,425.50 and 87,935.96 is: 131,904.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,616.36 : 431,425.50 = 87,935.96 : x
  2. Step 2: Convert to fraction form
    287,616.36/431,425.50 = 87,935.96/x
  3. Step 3: Cross multiply
    287,616.36x = 431,425.50 × 87,935.96
  4. Step 4: Simplify right side
    287,616.36x = 37,937,815,510.98
  5. Step 5: Solve for x
    x = 37,937,815,510.98/287,616.36
  6. Step 6: Final answer
    x = 131,904.23

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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.