Home / 131,387.40-197,178.30-86,999.40

Finding the Fourth Proportional to 131,387.40, 197,178.30 and 86,999.40

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Solution

The fourth proportional to 131,387.40, 197,178.30 and 86,999.40 is: 130,563.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,387.40 : 197,178.30 = 86,999.40 : x
  2. Step 2: Convert to fraction form
    131,387.40/197,178.30 = 86,999.40/x
  3. Step 3: Cross multiply
    131,387.40x = 197,178.30 × 86,999.40
  4. Step 4: Simplify right side
    131,387.40x = 17,154,393,793.02
  5. Step 5: Solve for x
    x = 17,154,393,793.02/131,387.40
  6. Step 6: Final answer
    x = 130,563.46

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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.