Home / 78,934.01-118,419.50-53,985.80

Finding the Fourth Proportional to 78,934.01, 118,419.50 and 53,985.80

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Solution

The fourth proportional to 78,934.01, 118,419.50 and 53,985.80 is: 80,991.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,934.01 : 118,419.50 = 53,985.80 : x
  2. Step 2: Convert to fraction form
    78,934.01/118,419.50 = 53,985.80/x
  3. Step 3: Cross multiply
    78,934.01x = 118,419.50 × 53,985.80
  4. Step 4: Simplify right side
    78,934.01x = 6,392,970,581.07
  5. Step 5: Solve for x
    x = 6,392,970,581.07/78,934.01
  6. Step 6: Final answer
    x = 80,991.34

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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.