Home / 142,125.26-196,127.72-78,461.70

Finding the Fourth Proportional to 142,125.26, 196,127.72 and 78,461.70

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Solution

The fourth proportional to 142,125.26, 196,127.72 and 78,461.70 is: 108,274.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,125.26 : 196,127.72 = 78,461.70 : x
  2. Step 2: Convert to fraction form
    142,125.26/196,127.72 = 78,461.70/x
  3. Step 3: Cross multiply
    142,125.26x = 196,127.72 × 78,461.70
  4. Step 4: Simplify right side
    142,125.26x = 15,388,514,328.32
  5. Step 5: Solve for x
    x = 15,388,514,328.32/142,125.26
  6. Step 6: Final answer
    x = 108,274.31

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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.