Home / 142,089.60-196,122.30-81,666.45

Finding the Fourth Proportional to 142,089.60, 196,122.30 and 81,666.45

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Solution

The fourth proportional to 142,089.60, 196,122.30 and 81,666.45 is: 112,721.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,089.60 : 196,122.30 = 81,666.45 : x
  2. Step 2: Convert to fraction form
    142,089.60/196,122.30 = 81,666.45/x
  3. Step 3: Cross multiply
    142,089.60x = 196,122.30 × 81,666.45
  4. Step 4: Simplify right side
    142,089.60x = 16,016,612,006.84
  5. Step 5: Solve for x
    x = 16,016,612,006.84/142,089.60
  6. Step 6: Final answer
    x = 112,721.92

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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.