Home / 78,718.08-117,555.36-69,179.52

Finding the Fourth Proportional to 78,718.08, 117,555.36 and 69,179.52

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Solution

The fourth proportional to 78,718.08, 117,555.36 and 69,179.52 is: 103,310.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,718.08 : 117,555.36 = 69,179.52 : x
  2. Step 2: Convert to fraction form
    78,718.08/117,555.36 = 69,179.52/x
  3. Step 3: Cross multiply
    78,718.08x = 117,555.36 × 69,179.52
  4. Step 4: Simplify right side
    78,718.08x = 8,132,423,378.23
  5. Step 5: Solve for x
    x = 8,132,423,378.23/78,718.08
  6. Step 6: Final answer
    x = 103,310.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.