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Finding the Fourth Proportional to 90,795.78, 136,307.07 and 61,344.18

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Solution

The fourth proportional to 90,795.78, 136,307.07 and 61,344.18 is: 92,092.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,795.78 : 136,307.07 = 61,344.18 : x
  2. Step 2: Convert to fraction form
    90,795.78/136,307.07 = 61,344.18/x
  3. Step 3: Cross multiply
    90,795.78x = 136,307.07 × 61,344.18
  4. Step 4: Simplify right side
    90,795.78x = 8,361,645,437.35
  5. Step 5: Solve for x
    x = 8,361,645,437.35/90,795.78
  6. Step 6: Final answer
    x = 92,092.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.