Home / 142,309.49-196,387.40-77,779.76

Finding the Fourth Proportional to 142,309.49, 196,387.40 and 77,779.76

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Solution

The fourth proportional to 142,309.49, 196,387.40 and 77,779.76 is: 107,336.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,309.49 : 196,387.40 = 77,779.76 : x
  2. Step 2: Convert to fraction form
    142,309.49/196,387.40 = 77,779.76/x
  3. Step 3: Cross multiply
    142,309.49x = 196,387.40 × 77,779.76
  4. Step 4: Simplify right side
    142,309.49x = 15,274,964,051.54
  5. Step 5: Solve for x
    x = 15,274,964,051.54/142,309.49
  6. Step 6: Final answer
    x = 107,336.23

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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.