Home / 142,051.78-196,065.01-81,657.46

Finding the Fourth Proportional to 142,051.78, 196,065.01 and 81,657.46

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Solution

The fourth proportional to 142,051.78, 196,065.01 and 81,657.46 is: 112,706.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,051.78 : 196,065.01 = 81,657.46 : x
  2. Step 2: Convert to fraction form
    142,051.78/196,065.01 = 81,657.46/x
  3. Step 3: Cross multiply
    142,051.78x = 196,065.01 × 81,657.46
  4. Step 4: Simplify right side
    142,051.78x = 16,010,170,711.47
  5. Step 5: Solve for x
    x = 16,010,170,711.47/142,051.78
  6. Step 6: Final answer
    x = 112,706.58

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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.