Home / 130,641.28-180,288.12-79,656.64

Finding the Fourth Proportional to 130,641.28, 180,288.12 and 79,656.64

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Solution

The fourth proportional to 130,641.28, 180,288.12 and 79,656.64 is: 109,928.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,641.28 : 180,288.12 = 79,656.64 : x
  2. Step 2: Convert to fraction form
    130,641.28/180,288.12 = 79,656.64/x
  3. Step 3: Cross multiply
    130,641.28x = 180,288.12 × 79,656.64
  4. Step 4: Simplify right side
    130,641.28x = 14,361,145,871.12
  5. Step 5: Solve for x
    x = 14,361,145,871.12/130,641.28
  6. Step 6: Final answer
    x = 109,928.09

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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.