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Finding the Fourth Proportional to 78,842.40, 118,203.36 and 39,427.20

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Solution

The fourth proportional to 78,842.40, 118,203.36 and 39,427.20 is: 59,110.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,842.40 : 118,203.36 = 39,427.20 : x
  2. Step 2: Convert to fraction form
    78,842.40/118,203.36 = 39,427.20/x
  3. Step 3: Cross multiply
    78,842.40x = 118,203.36 × 39,427.20
  4. Step 4: Simplify right side
    78,842.40x = 4,660,427,515.39
  5. Step 5: Solve for x
    x = 4,660,427,515.39/78,842.40
  6. Step 6: Final answer
    x = 59,110.68

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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.