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Finding the Fourth Proportional to 155,640.98, 216,234.58 and 153,774.74

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Solution

The fourth proportional to 155,640.98, 216,234.58 and 153,774.74 is: 213,641.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,640.98 : 216,234.58 = 153,774.74 : x
  2. Step 2: Convert to fraction form
    155,640.98/216,234.58 = 153,774.74/x
  3. Step 3: Cross multiply
    155,640.98x = 216,234.58 × 153,774.74
  4. Step 4: Simplify right side
    155,640.98x = 33,251,415,549.64
  5. Step 5: Solve for x
    x = 33,251,415,549.64/155,640.98
  6. Step 6: Final answer
    x = 213,641.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.