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Finding the Fourth Proportional to 158,364.78, 218,482.59 and 90,385.53

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Solution

The fourth proportional to 158,364.78, 218,482.59 and 90,385.53 is: 124,697.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,364.78 : 218,482.59 = 90,385.53 : x
  2. Step 2: Convert to fraction form
    158,364.78/218,482.59 = 90,385.53/x
  3. Step 3: Cross multiply
    158,364.78x = 218,482.59 × 90,385.53
  4. Step 4: Simplify right side
    158,364.78x = 19,747,664,692.92
  5. Step 5: Solve for x
    x = 19,747,664,692.92/158,364.78
  6. Step 6: Final answer
    x = 124,697.33

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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.