Home / 130,011.28-179,470.80-79,040.28

Finding the Fourth Proportional to 130,011.28, 179,470.80 and 79,040.28

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Solution

The fourth proportional to 130,011.28, 179,470.80 and 79,040.28 is: 109,109.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,011.28 : 179,470.80 = 79,040.28 : x
  2. Step 2: Convert to fraction form
    130,011.28/179,470.80 = 79,040.28/x
  3. Step 3: Cross multiply
    130,011.28x = 179,470.80 × 79,040.28
  4. Step 4: Simplify right side
    130,011.28x = 14,185,422,283.82
  5. Step 5: Solve for x
    x = 14,185,422,283.82/130,011.28
  6. Step 6: Final answer
    x = 109,109.17

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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.