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Finding the Fourth Proportional to 156,377.89, 215,799.15 and 88,392.47

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Solution

The fourth proportional to 156,377.89, 215,799.15 and 88,392.47 is: 121,980.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,377.89 : 215,799.15 = 88,392.47 : x
  2. Step 2: Convert to fraction form
    156,377.89/215,799.15 = 88,392.47/x
  3. Step 3: Cross multiply
    156,377.89x = 215,799.15 × 88,392.47
  4. Step 4: Simplify right side
    156,377.89x = 19,075,020,219.87
  5. Step 5: Solve for x
    x = 19,075,020,219.87/156,377.89
  6. Step 6: Final answer
    x = 121,980.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.