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Finding the Fourth Proportional to 287,840.76, 431,762.22 and 88,160.28

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Solution

The fourth proportional to 287,840.76, 431,762.22 and 88,160.28 is: 132,240.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,840.76 : 431,762.22 = 88,160.28 : x
  2. Step 2: Convert to fraction form
    287,840.76/431,762.22 = 88,160.28/x
  3. Step 3: Cross multiply
    287,840.76x = 431,762.22 × 88,160.28
  4. Step 4: Simplify right side
    287,840.76x = 38,064,278,208.62
  5. Step 5: Solve for x
    x = 38,064,278,208.62/287,840.76
  6. Step 6: Final answer
    x = 132,240.75

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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.