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Finding the Fourth Proportional to 86,477.76, 129,543.84 and 79,168.32

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Solution

The fourth proportional to 86,477.76, 129,543.84 and 79,168.32 is: 118,594.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,477.76 : 129,543.84 = 79,168.32 : x
  2. Step 2: Convert to fraction form
    86,477.76/129,543.84 = 79,168.32/x
  3. Step 3: Cross multiply
    86,477.76x = 129,543.84 × 79,168.32
  4. Step 4: Simplify right side
    86,477.76x = 10,255,768,179.15
  5. Step 5: Solve for x
    x = 10,255,768,179.15/86,477.76
  6. Step 6: Final answer
    x = 118,594.29

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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.