Home / 78,247.55-117,341.85-28,315.30

Finding the Fourth Proportional to 78,247.55, 117,341.85 and 28,315.30

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Solution

The fourth proportional to 78,247.55, 117,341.85 and 28,315.30 is: 42,462.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,247.55 : 117,341.85 = 28,315.30 : x
  2. Step 2: Convert to fraction form
    78,247.55/117,341.85 = 28,315.30/x
  3. Step 3: Cross multiply
    78,247.55x = 117,341.85 × 28,315.30
  4. Step 4: Simplify right side
    78,247.55x = 3,322,569,685.31
  5. Step 5: Solve for x
    x = 3,322,569,685.31/78,247.55
  6. Step 6: Final answer
    x = 42,462.28

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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.