Home / 142,001.56-195,962.12-78,339.36

Finding the Fourth Proportional to 142,001.56, 195,962.12 and 78,339.36

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Solution

The fourth proportional to 142,001.56, 195,962.12 and 78,339.36 is: 108,108.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,001.56 : 195,962.12 = 78,339.36 : x
  2. Step 2: Convert to fraction form
    142,001.56/195,962.12 = 78,339.36/x
  3. Step 3: Cross multiply
    142,001.56x = 195,962.12 × 78,339.36
  4. Step 4: Simplify right side
    142,001.56x = 15,351,547,065.04
  5. Step 5: Solve for x
    x = 15,351,547,065.04/142,001.56
  6. Step 6: Final answer
    x = 108,108.30

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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.