Home / 142,551.12-196,700.40-78,888.72

Finding the Fourth Proportional to 142,551.12, 196,700.40 and 78,888.72

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Solution

The fourth proportional to 142,551.12, 196,700.40 and 78,888.72 is: 108,855.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,551.12 : 196,700.40 = 78,888.72 : x
  2. Step 2: Convert to fraction form
    142,551.12/196,700.40 = 78,888.72/x
  3. Step 3: Cross multiply
    142,551.12x = 196,700.40 × 78,888.72
  4. Step 4: Simplify right side
    142,551.12x = 15,517,442,779.49
  5. Step 5: Solve for x
    x = 15,517,442,779.49/142,551.12
  6. Step 6: Final answer
    x = 108,855.28

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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.