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Finding the Fourth Proportional to 113,381.70, 170,090.55 and 38,508.90

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Solution

The fourth proportional to 113,381.70, 170,090.55 and 38,508.90 is: 57,769.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,381.70 : 170,090.55 = 38,508.90 : x
  2. Step 2: Convert to fraction form
    113,381.70/170,090.55 = 38,508.90/x
  3. Step 3: Cross multiply
    113,381.70x = 170,090.55 × 38,508.90
  4. Step 4: Simplify right side
    113,381.70x = 6,549,999,980.90
  5. Step 5: Solve for x
    x = 6,549,999,980.90/113,381.70
  6. Step 6: Final answer
    x = 57,769.46

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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.