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Finding the Fourth Proportional to 88,821.80, 133,038.30 and 77,157.80

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Solution

The fourth proportional to 88,821.80, 133,038.30 and 77,157.80 is: 115,567.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,821.80 : 133,038.30 = 77,157.80 : x
  2. Step 2: Convert to fraction form
    88,821.80/133,038.30 = 77,157.80/x
  3. Step 3: Cross multiply
    88,821.80x = 133,038.30 × 77,157.80
  4. Step 4: Simplify right side
    88,821.80x = 10,264,942,543.74
  5. Step 5: Solve for x
    x = 10,264,942,543.74/88,821.80
  6. Step 6: Final answer
    x = 115,567.83

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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.