Home / 130,281.12-179,784.76-72,921.20

Finding the Fourth Proportional to 130,281.12, 179,784.76 and 72,921.20

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Solution

The fourth proportional to 130,281.12, 179,784.76 and 72,921.20 is: 100,629.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,281.12 : 179,784.76 = 72,921.20 : x
  2. Step 2: Convert to fraction form
    130,281.12/179,784.76 = 72,921.20/x
  3. Step 3: Cross multiply
    130,281.12x = 179,784.76 × 72,921.20
  4. Step 4: Simplify right side
    130,281.12x = 13,110,120,440.91
  5. Step 5: Solve for x
    x = 13,110,120,440.91/130,281.12
  6. Step 6: Final answer
    x = 100,629.47

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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.