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Finding the Fourth Proportional to 113,314.80, 169,988.40 and 38,438.40

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Solution

The fourth proportional to 113,314.80, 169,988.40 and 38,438.40 is: 57,663.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,314.80 : 169,988.40 = 38,438.40 : x
  2. Step 2: Convert to fraction form
    113,314.80/169,988.40 = 38,438.40/x
  3. Step 3: Cross multiply
    113,314.80x = 169,988.40 × 38,438.40
  4. Step 4: Simplify right side
    113,314.80x = 6,534,082,114.56
  5. Step 5: Solve for x
    x = 6,534,082,114.56/113,314.80
  6. Step 6: Final answer
    x = 57,663.10

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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.