Home / 78,370.32-117,561.12-38,887.68

Finding the Fourth Proportional to 78,370.32, 117,561.12 and 38,887.68

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Solution

The fourth proportional to 78,370.32, 117,561.12 and 38,887.68 is: 58,334.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,370.32 : 117,561.12 = 38,887.68 : x
  2. Step 2: Convert to fraction form
    78,370.32/117,561.12 = 38,887.68/x
  3. Step 3: Cross multiply
    78,370.32x = 117,561.12 × 38,887.68
  4. Step 4: Simplify right side
    78,370.32x = 4,571,679,215.00
  5. Step 5: Solve for x
    x = 4,571,679,215.00/78,370.32
  6. Step 6: Final answer
    x = 58,334.32

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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.