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Finding the Fourth Proportional to 287,597.04, 431,396.64 and 87,916.65

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Solution

The fourth proportional to 287,597.04, 431,396.64 and 87,916.65 is: 131,875.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,597.04 : 431,396.64 = 87,916.65 : x
  2. Step 2: Convert to fraction form
    287,597.04/431,396.64 = 87,916.65/x
  3. Step 3: Cross multiply
    287,597.04x = 431,396.64 × 87,916.65
  4. Step 4: Simplify right side
    287,597.04x = 37,926,947,410.06
  5. Step 5: Solve for x
    x = 37,926,947,410.06/287,597.04
  6. Step 6: Final answer
    x = 131,875.31

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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.