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Finding the Fourth Proportional to 113,084.80, 169,627.20 and 66,428.80

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Solution

The fourth proportional to 113,084.80, 169,627.20 and 66,428.80 is: 99,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,084.80 : 169,627.20 = 66,428.80 : x
  2. Step 2: Convert to fraction form
    113,084.80/169,627.20 = 66,428.80/x
  3. Step 3: Cross multiply
    113,084.80x = 169,627.20 × 66,428.80
  4. Step 4: Simplify right side
    113,084.80x = 11,268,131,343.36
  5. Step 5: Solve for x
    x = 11,268,131,343.36/113,084.80
  6. Step 6: Final answer
    x = 99,643.20

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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.