Home / 142,122.98-196,144.16-81,696.18

Finding the Fourth Proportional to 142,122.98, 196,144.16 and 81,696.18

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Solution

The fourth proportional to 142,122.98, 196,144.16 and 81,696.18 is: 112,749.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,122.98 : 196,144.16 = 81,696.18 : x
  2. Step 2: Convert to fraction form
    142,122.98/196,144.16 = 81,696.18/x
  3. Step 3: Cross multiply
    142,122.98x = 196,144.16 × 81,696.18
  4. Step 4: Simplify right side
    142,122.98x = 16,024,228,601.31
  5. Step 5: Solve for x
    x = 16,024,228,601.31/142,122.98
  6. Step 6: Final answer
    x = 112,749.03

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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.