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Finding the Fourth Proportional to 90,830.80, 136,100.40 and 59,629.60

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Solution

The fourth proportional to 90,830.80, 136,100.40 and 59,629.60 is: 89,348.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,830.80 : 136,100.40 = 59,629.60 : x
  2. Step 2: Convert to fraction form
    90,830.80/136,100.40 = 59,629.60/x
  3. Step 3: Cross multiply
    90,830.80x = 136,100.40 × 59,629.60
  4. Step 4: Simplify right side
    90,830.80x = 8,115,612,411.84
  5. Step 5: Solve for x
    x = 8,115,612,411.84/90,830.80
  6. Step 6: Final answer
    x = 89,348.68

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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.