Home / 78,868.48-118,302.06-19,703.80

Finding the Fourth Proportional to 78,868.48, 118,302.06 and 19,703.80

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Solution

The fourth proportional to 78,868.48, 118,302.06 and 19,703.80 is: 29,555.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,868.48 : 118,302.06 = 19,703.80 : x
  2. Step 2: Convert to fraction form
    78,868.48/118,302.06 = 19,703.80/x
  3. Step 3: Cross multiply
    78,868.48x = 118,302.06 × 19,703.80
  4. Step 4: Simplify right side
    78,868.48x = 2,331,000,129.83
  5. Step 5: Solve for x
    x = 2,331,000,129.83/78,868.48
  6. Step 6: Final answer
    x = 29,555.54

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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.