Home / 142,001.42-195,962.62-78,339.20

Finding the Fourth Proportional to 142,001.42, 195,962.62 and 78,339.20

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Solution

The fourth proportional to 142,001.42, 195,962.62 and 78,339.20 is: 108,108.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,001.42 : 195,962.62 = 78,339.20 : x
  2. Step 2: Convert to fraction form
    142,001.42/195,962.62 = 78,339.20/x
  3. Step 3: Cross multiply
    142,001.42x = 195,962.62 × 78,339.20
  4. Step 4: Simplify right side
    142,001.42x = 15,351,554,880.70
  5. Step 5: Solve for x
    x = 15,351,554,880.70/142,001.42
  6. Step 6: Final answer
    x = 108,108.46

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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.