Home / 78,261.12-117,387.36-57,222.72

Finding the Fourth Proportional to 78,261.12, 117,387.36 and 57,222.72

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Solution

The fourth proportional to 78,261.12, 117,387.36 and 57,222.72 is: 85,830.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,261.12 : 117,387.36 = 57,222.72 : x
  2. Step 2: Convert to fraction form
    78,261.12/117,387.36 = 57,222.72/x
  3. Step 3: Cross multiply
    78,261.12x = 117,387.36 × 57,222.72
  4. Step 4: Simplify right side
    78,261.12x = 6,717,224,032.82
  5. Step 5: Solve for x
    x = 6,717,224,032.82/78,261.12
  6. Step 6: Final answer
    x = 85,830.92

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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.