Home / 78,400.39-117,593.64-28,480.91

Finding the Fourth Proportional to 78,400.39, 117,593.64 and 28,480.91

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Solution

The fourth proportional to 78,400.39, 117,593.64 and 28,480.91 is: 42,718.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,400.39 : 117,593.64 = 28,480.91 : x
  2. Step 2: Convert to fraction form
    78,400.39/117,593.64 = 28,480.91/x
  3. Step 3: Cross multiply
    78,400.39x = 117,593.64 × 28,480.91
  4. Step 4: Simplify right side
    78,400.39x = 3,349,173,877.41
  5. Step 5: Solve for x
    x = 3,349,173,877.41/78,400.39
  6. Step 6: Final answer
    x = 42,718.84

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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.