Home / 78,478.85-117,718.28-25,875.65

Finding the Fourth Proportional to 78,478.85, 117,718.28 and 25,875.65

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Solution

The fourth proportional to 78,478.85, 117,718.28 and 25,875.65 is: 38,813.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,478.85 : 117,718.28 = 25,875.65 : x
  2. Step 2: Convert to fraction form
    78,478.85/117,718.28 = 25,875.65/x
  3. Step 3: Cross multiply
    78,478.85x = 117,718.28 × 25,875.65
  4. Step 4: Simplify right side
    78,478.85x = 3,046,036,882.50
  5. Step 5: Solve for x
    x = 3,046,036,882.50/78,478.85
  6. Step 6: Final answer
    x = 38,813.48

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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.