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Finding the Fourth Proportional to 155,888, 215,125.52 and 88,820

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Solution

The fourth proportional to 155,888, 215,125.52 and 88,820 is: 122,571.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,888 : 215,125.52 = 88,820 : x
  2. Step 2: Convert to fraction form
    155,888/215,125.52 = 88,820/x
  3. Step 3: Cross multiply
    155,888x = 215,125.52 × 88,820
  4. Step 4: Simplify right side
    155,888x = 19,107,448,686.40
  5. Step 5: Solve for x
    x = 19,107,448,686.40/155,888
  6. Step 6: Final answer
    x = 122,571.65

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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.