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Finding the Fourth Proportional to 78,897.80, 118,419.60 and 39,483.20

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Solution

The fourth proportional to 78,897.80, 118,419.60 and 39,483.20 is: 59,261.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,897.80 : 118,419.60 = 39,483.20 : x
  2. Step 2: Convert to fraction form
    78,897.80/118,419.60 = 39,483.20/x
  3. Step 3: Cross multiply
    78,897.80x = 118,419.60 × 39,483.20
  4. Step 4: Simplify right side
    78,897.80x = 4,675,584,750.72
  5. Step 5: Solve for x
    x = 4,675,584,750.72/78,897.80
  6. Step 6: Final answer
    x = 59,261.28

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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.