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Finding the Fourth Proportional to 155,848, 215,070.24 and 88,780

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Solution

The fourth proportional to 155,848, 215,070.24 and 88,780 is: 122,516.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,848 : 215,070.24 = 88,780 : x
  2. Step 2: Convert to fraction form
    155,848/215,070.24 = 88,780/x
  3. Step 3: Cross multiply
    155,848x = 215,070.24 × 88,780
  4. Step 4: Simplify right side
    155,848x = 19,093,935,907.20
  5. Step 5: Solve for x
    x = 19,093,935,907.20/155,848
  6. Step 6: Final answer
    x = 122,516.40

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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.