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Finding the Fourth Proportional to 287,374.64, 431,061.95 and 87,696.06

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Solution

The fourth proportional to 287,374.64, 431,061.95 and 87,696.06 is: 131,544.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,374.64 : 431,061.95 = 87,696.06 : x
  2. Step 2: Convert to fraction form
    287,374.64/431,061.95 = 87,696.06/x
  3. Step 3: Cross multiply
    287,374.64x = 431,061.95 × 87,696.06
  4. Step 4: Simplify right side
    287,374.64x = 37,802,434,192.44
  5. Step 5: Solve for x
    x = 37,802,434,192.44/287,374.64
  6. Step 6: Final answer
    x = 131,544.09

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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.