Home / 142,020.68-195,999.54-78,364.04

Finding the Fourth Proportional to 142,020.68, 195,999.54 and 78,364.04

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Solution

The fourth proportional to 142,020.68, 195,999.54 and 78,364.04 is: 108,148.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,020.68 : 195,999.54 = 78,364.04 : x
  2. Step 2: Convert to fraction form
    142,020.68/195,999.54 = 78,364.04/x
  3. Step 3: Cross multiply
    142,020.68x = 195,999.54 × 78,364.04
  4. Step 4: Simplify right side
    142,020.68x = 15,359,315,792.54
  5. Step 5: Solve for x
    x = 15,359,315,792.54/142,020.68
  6. Step 6: Final answer
    x = 108,148.45

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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.