Home / 142,102.12-196,105.86-78,442.28

Finding the Fourth Proportional to 142,102.12, 196,105.86 and 78,442.28

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Solution

The fourth proportional to 142,102.12, 196,105.86 and 78,442.28 is: 108,253.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,102.12 : 196,105.86 = 78,442.28 : x
  2. Step 2: Convert to fraction form
    142,102.12/196,105.86 = 78,442.28/x
  3. Step 3: Cross multiply
    142,102.12x = 196,105.86 × 78,442.28
  4. Step 4: Simplify right side
    142,102.12x = 15,382,990,779.76
  5. Step 5: Solve for x
    x = 15,382,990,779.76/142,102.12
  6. Step 6: Final answer
    x = 108,253.07

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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.