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Finding the Fourth Proportional to 213,117.60, 319,561.20 and 88,471.20

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Solution

The fourth proportional to 213,117.60, 319,561.20 and 88,471.20 is: 132,658.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,117.60 : 319,561.20 = 88,471.20 : x
  2. Step 2: Convert to fraction form
    213,117.60/319,561.20 = 88,471.20/x
  3. Step 3: Cross multiply
    213,117.60x = 319,561.20 × 88,471.20
  4. Step 4: Simplify right side
    213,117.60x = 28,271,962,837.44
  5. Step 5: Solve for x
    x = 28,271,962,837.44/213,117.60
  6. Step 6: Final answer
    x = 132,658.98

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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.