Home / 86,629.20-129,943.80-72,632.40

Finding the Fourth Proportional to 86,629.20, 129,943.80 and 72,632.40

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Solution

The fourth proportional to 86,629.20, 129,943.80 and 72,632.40 is: 108,948.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,629.20 : 129,943.80 = 72,632.40 : x
  2. Step 2: Convert to fraction form
    86,629.20/129,943.80 = 72,632.40/x
  3. Step 3: Cross multiply
    86,629.20x = 129,943.80 × 72,632.40
  4. Step 4: Simplify right side
    86,629.20x = 9,438,130,059.12
  5. Step 5: Solve for x
    x = 9,438,130,059.12/86,629.20
  6. Step 6: Final answer
    x = 108,948.60

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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.