Home / 78,085.07-117,127.16-21,925.20

Finding the Fourth Proportional to 78,085.07, 117,127.16 and 21,925.20

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Solution

The fourth proportional to 78,085.07, 117,127.16 and 21,925.20 is: 32,887.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,085.07 : 117,127.16 = 21,925.20 : x
  2. Step 2: Convert to fraction form
    78,085.07/117,127.16 = 21,925.20/x
  3. Step 3: Cross multiply
    78,085.07x = 117,127.16 × 21,925.20
  4. Step 4: Simplify right side
    78,085.07x = 2,568,036,408.43
  5. Step 5: Solve for x
    x = 2,568,036,408.43/78,085.07
  6. Step 6: Final answer
    x = 32,887.68

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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.