Home / 78,862.50-118,293.09-19,697.77

Finding the Fourth Proportional to 78,862.50, 118,293.09 and 19,697.77

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Solution

The fourth proportional to 78,862.50, 118,293.09 and 19,697.77 is: 29,546.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,862.50 : 118,293.09 = 19,697.77 : x
  2. Step 2: Convert to fraction form
    78,862.50/118,293.09 = 19,697.77/x
  3. Step 3: Cross multiply
    78,862.50x = 118,293.09 × 19,697.77
  4. Step 4: Simplify right side
    78,862.50x = 2,330,110,079.41
  5. Step 5: Solve for x
    x = 2,330,110,079.41/78,862.50
  6. Step 6: Final answer
    x = 29,546.49

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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.