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Finding the Fourth Proportional to 78,847.60, 118,271.40 and 75,434.80

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Solution

The fourth proportional to 78,847.60, 118,271.40 and 75,434.80 is: 113,152.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,847.60 : 118,271.40 = 75,434.80 : x
  2. Step 2: Convert to fraction form
    78,847.60/118,271.40 = 75,434.80/x
  3. Step 3: Cross multiply
    78,847.60x = 118,271.40 × 75,434.80
  4. Step 4: Simplify right side
    78,847.60x = 8,921,779,404.72
  5. Step 5: Solve for x
    x = 8,921,779,404.72/78,847.60
  6. Step 6: Final answer
    x = 113,152.20

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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.