Home / 142,083.65-196,074.47-78,421.43

Finding the Fourth Proportional to 142,083.65, 196,074.47 and 78,421.43

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Solution

The fourth proportional to 142,083.65, 196,074.47 and 78,421.43 is: 108,221.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,083.65 : 196,074.47 = 78,421.43 : x
  2. Step 2: Convert to fraction form
    142,083.65/196,074.47 = 78,421.43/x
  3. Step 3: Cross multiply
    142,083.65x = 196,074.47 × 78,421.43
  4. Step 4: Simplify right side
    142,083.65x = 15,376,441,010.13
  5. Step 5: Solve for x
    x = 15,376,441,010.13/142,083.65
  6. Step 6: Final answer
    x = 108,221.04

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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.