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Finding the Fourth Proportional to 86,740.80, 130,111.20 and 67,057.80

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Solution

The fourth proportional to 86,740.80, 130,111.20 and 67,057.80 is: 100,586.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,740.80 : 130,111.20 = 67,057.80 : x
  2. Step 2: Convert to fraction form
    86,740.80/130,111.20 = 67,057.80/x
  3. Step 3: Cross multiply
    86,740.80x = 130,111.20 × 67,057.80
  4. Step 4: Simplify right side
    86,740.80x = 8,724,970,827.36
  5. Step 5: Solve for x
    x = 8,724,970,827.36/86,740.80
  6. Step 6: Final answer
    x = 100,586.70

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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.