Home / 142,080.29-196,070.39-78,417.63

Finding the Fourth Proportional to 142,080.29, 196,070.39 and 78,417.63

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Solution

The fourth proportional to 142,080.29, 196,070.39 and 78,417.63 is: 108,216.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,080.29 : 196,070.39 = 78,417.63 : x
  2. Step 2: Convert to fraction form
    142,080.29/196,070.39 = 78,417.63/x
  3. Step 3: Cross multiply
    142,080.29x = 196,070.39 × 78,417.63
  4. Step 4: Simplify right side
    142,080.29x = 15,375,375,296.98
  5. Step 5: Solve for x
    x = 15,375,375,296.98/142,080.29
  6. Step 6: Final answer
    x = 108,216.10

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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.