Home / 78,250.77-117,193.61-57,138.45

Finding the Fourth Proportional to 78,250.77, 117,193.61 and 57,138.45

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Solution

The fourth proportional to 78,250.77, 117,193.61 and 57,138.45 is: 85,574.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,250.77 : 117,193.61 = 57,138.45 : x
  2. Step 2: Convert to fraction form
    78,250.77/117,193.61 = 57,138.45/x
  3. Step 3: Cross multiply
    78,250.77x = 117,193.61 × 57,138.45
  4. Step 4: Simplify right side
    78,250.77x = 6,696,260,939.61
  5. Step 5: Solve for x
    x = 6,696,260,939.61/78,250.77
  6. Step 6: Final answer
    x = 85,574.38

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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.