Home / 157,638.20-217,538.90-86,019.40

Finding the Fourth Proportional to 157,638.20, 217,538.90 and 86,019.40

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Solution

The fourth proportional to 157,638.20, 217,538.90 and 86,019.40 is: 118,705.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,638.20 : 217,538.90 = 86,019.40 : x
  2. Step 2: Convert to fraction form
    157,638.20/217,538.90 = 86,019.40/x
  3. Step 3: Cross multiply
    157,638.20x = 217,538.90 × 86,019.40
  4. Step 4: Simplify right side
    157,638.20x = 18,712,565,654.66
  5. Step 5: Solve for x
    x = 18,712,565,654.66/157,638.20
  6. Step 6: Final answer
    x = 118,705.78

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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.