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Finding the Fourth Proportional to 86,140.56, 129,210.83 and 26,980.86

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Solution

The fourth proportional to 86,140.56, 129,210.83 and 26,980.86 is: 40,471.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,140.56 : 129,210.83 = 26,980.86 : x
  2. Step 2: Convert to fraction form
    86,140.56/129,210.83 = 26,980.86/x
  3. Step 3: Cross multiply
    86,140.56x = 129,210.83 × 26,980.86
  4. Step 4: Simplify right side
    86,140.56x = 3,486,219,179.81
  5. Step 5: Solve for x
    x = 3,486,219,179.81/86,140.56
  6. Step 6: Final answer
    x = 40,471.29

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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.