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Finding the Fourth Proportional to 78,681.60, 118,022.40 and 49,132.80

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Solution

The fourth proportional to 78,681.60, 118,022.40 and 49,132.80 is: 73,699.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,681.60 : 118,022.40 = 49,132.80 : x
  2. Step 2: Convert to fraction form
    78,681.60/118,022.40 = 49,132.80/x
  3. Step 3: Cross multiply
    78,681.60x = 118,022.40 × 49,132.80
  4. Step 4: Simplify right side
    78,681.60x = 5,798,770,974.72
  5. Step 5: Solve for x
    x = 5,798,770,974.72/78,681.60
  6. Step 6: Final answer
    x = 73,699.20

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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.