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Finding the Fourth Proportional to 113,990.40, 157,306.90 and 65,591.36

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Solution

The fourth proportional to 113,990.40, 157,306.90 and 65,591.36 is: 90,516.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,990.40 : 157,306.90 = 65,591.36 : x
  2. Step 2: Convert to fraction form
    113,990.40/157,306.90 = 65,591.36/x
  3. Step 3: Cross multiply
    113,990.40x = 157,306.90 × 65,591.36
  4. Step 4: Simplify right side
    113,990.40x = 10,317,973,504.21
  5. Step 5: Solve for x
    x = 10,317,973,504.21/113,990.40
  6. Step 6: Final answer
    x = 90,516.16

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1.5x scale

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.