Home / 140,021.84-193,233.12-78,766.40

Finding the Fourth Proportional to 140,021.84, 193,233.12 and 78,766.40

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Solution

The fourth proportional to 140,021.84, 193,233.12 and 78,766.40 is: 108,699.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,021.84 : 193,233.12 = 78,766.40 : x
  2. Step 2: Convert to fraction form
    140,021.84/193,233.12 = 78,766.40/x
  3. Step 3: Cross multiply
    140,021.84x = 193,233.12 × 78,766.40
  4. Step 4: Simplify right side
    140,021.84x = 15,220,277,223.17
  5. Step 5: Solve for x
    x = 15,220,277,223.17/140,021.84
  6. Step 6: Final answer
    x = 108,699.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.