Home / 142,649.22-196,853.51-78,985.65

Finding the Fourth Proportional to 142,649.22, 196,853.51 and 78,985.65

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Solution

The fourth proportional to 142,649.22, 196,853.51 and 78,985.65 is: 108,998.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,649.22 : 196,853.51 = 78,985.65 : x
  2. Step 2: Convert to fraction form
    142,649.22/196,853.51 = 78,985.65/x
  3. Step 3: Cross multiply
    142,649.22x = 196,853.51 × 78,985.65
  4. Step 4: Simplify right side
    142,649.22x = 15,548,602,639.60
  5. Step 5: Solve for x
    x = 15,548,602,639.60/142,649.22
  6. Step 6: Final answer
    x = 108,998.86

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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.