Home / 85,081.60-117,325.56-56,391.28

Finding the Fourth Proportional to 85,081.60, 117,325.56 and 56,391.28

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Solution

The fourth proportional to 85,081.60, 117,325.56 and 56,391.28 is: 77,762.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,081.60 : 117,325.56 = 56,391.28 : x
  2. Step 2: Convert to fraction form
    85,081.60/117,325.56 = 56,391.28/x
  3. Step 3: Cross multiply
    85,081.60x = 117,325.56 × 56,391.28
  4. Step 4: Simplify right side
    85,081.60x = 6,616,138,505.12
  5. Step 5: Solve for x
    x = 6,616,138,505.12/85,081.60
  6. Step 6: Final answer
    x = 77,762.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.