Home / 134,905.18-186,140.25-78,286.18

Finding the Fourth Proportional to 134,905.18, 186,140.25 and 78,286.18

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Solution

The fourth proportional to 134,905.18, 186,140.25 and 78,286.18 is: 108,018.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,905.18 : 186,140.25 = 78,286.18 : x
  2. Step 2: Convert to fraction form
    134,905.18/186,140.25 = 78,286.18/x
  3. Step 3: Cross multiply
    134,905.18x = 186,140.25 × 78,286.18
  4. Step 4: Simplify right side
    134,905.18x = 14,572,209,116.75
  5. Step 5: Solve for x
    x = 14,572,209,116.75/134,905.18
  6. Step 6: Final answer
    x = 108,018.16

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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.