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Finding the Fourth Proportional to 86,740.70, 130,123.20 and 36,820.40

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Solution

The fourth proportional to 86,740.70, 130,123.20 and 36,820.40 is: 55,235.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,740.70 : 130,123.20 = 36,820.40 : x
  2. Step 2: Convert to fraction form
    86,740.70/130,123.20 = 36,820.40/x
  3. Step 3: Cross multiply
    86,740.70x = 130,123.20 × 36,820.40
  4. Step 4: Simplify right side
    86,740.70x = 4,791,188,273.28
  5. Step 5: Solve for x
    x = 4,791,188,273.28/86,740.70
  6. Step 6: Final answer
    x = 55,235.76

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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.