Home / 142,623.19-196,820-78,965.09

Finding the Fourth Proportional to 142,623.19, 196,820 and 78,965.09

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Solution

The fourth proportional to 142,623.19, 196,820 and 78,965.09 is: 108,971.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,623.19 : 196,820 = 78,965.09 : x
  2. Step 2: Convert to fraction form
    142,623.19/196,820 = 78,965.09/x
  3. Step 3: Cross multiply
    142,623.19x = 196,820 × 78,965.09
  4. Step 4: Simplify right side
    142,623.19x = 15,541,908,029.70
  5. Step 5: Solve for x
    x = 15,541,908,029.70/142,623.19
  6. Step 6: Final answer
    x = 108,971.82

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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.