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Finding the Fourth Proportional to 287,400.64, 431,100.87 and 87,722.02

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Solution

The fourth proportional to 287,400.64, 431,100.87 and 87,722.02 is: 131,583.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,400.64 : 431,100.87 = 87,722.02 : x
  2. Step 2: Convert to fraction form
    287,400.64/431,100.87 = 87,722.02/x
  3. Step 3: Cross multiply
    287,400.64x = 431,100.87 × 87,722.02
  4. Step 4: Simplify right side
    287,400.64x = 37,817,039,140.16
  5. Step 5: Solve for x
    x = 37,817,039,140.16/287,400.64
  6. Step 6: Final answer
    x = 131,583.00

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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.