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Finding the Fourth Proportional to 287,549.04, 431,174.52 and 87,828.96

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Solution

The fourth proportional to 287,549.04, 431,174.52 and 87,828.96 is: 131,697.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,549.04 : 431,174.52 = 87,828.96 : x
  2. Step 2: Convert to fraction form
    287,549.04/431,174.52 = 87,828.96/x
  3. Step 3: Cross multiply
    287,549.04x = 431,174.52 × 87,828.96
  4. Step 4: Simplify right side
    287,549.04x = 37,869,609,670.10
  5. Step 5: Solve for x
    x = 37,869,609,670.10/287,549.04
  6. Step 6: Final answer
    x = 131,697.92

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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.