Home / 142,346.80-196,430.16-78,680.80

Finding the Fourth Proportional to 142,346.80, 196,430.16 and 78,680.80

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Solution

The fourth proportional to 142,346.80, 196,430.16 and 78,680.80 is: 108,574.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,346.80 : 196,430.16 = 78,680.80 : x
  2. Step 2: Convert to fraction form
    142,346.80/196,430.16 = 78,680.80/x
  3. Step 3: Cross multiply
    142,346.80x = 196,430.16 × 78,680.80
  4. Step 4: Simplify right side
    142,346.80x = 15,455,282,132.93
  5. Step 5: Solve for x
    x = 15,455,282,132.93/142,346.80
  6. Step 6: Final answer
    x = 108,574.85

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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.