Home / 142,085.60-196,064.15-78,419.30

Finding the Fourth Proportional to 142,085.60, 196,064.15 and 78,419.30

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Solution

The fourth proportional to 142,085.60, 196,064.15 and 78,419.30 is: 108,210.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,085.60 : 196,064.15 = 78,419.30 : x
  2. Step 2: Convert to fraction form
    142,085.60/196,064.15 = 78,419.30/x
  3. Step 3: Cross multiply
    142,085.60x = 196,064.15 × 78,419.30
  4. Step 4: Simplify right side
    142,085.60x = 15,375,212,025.68
  5. Step 5: Solve for x
    x = 15,375,212,025.68/142,085.60
  6. Step 6: Final answer
    x = 108,210.91

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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.