Home / 142,151.80-196,172.04-78,488.16

Finding the Fourth Proportional to 142,151.80, 196,172.04 and 78,488.16

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Solution

The fourth proportional to 142,151.80, 196,172.04 and 78,488.16 is: 108,315.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,151.80 : 196,172.04 = 78,488.16 : x
  2. Step 2: Convert to fraction form
    142,151.80/196,172.04 = 78,488.16/x
  3. Step 3: Cross multiply
    142,151.80x = 196,172.04 × 78,488.16
  4. Step 4: Simplify right side
    142,151.80x = 15,397,182,463.05
  5. Step 5: Solve for x
    x = 15,397,182,463.05/142,151.80
  6. Step 6: Final answer
    x = 108,315.07

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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.