Home / 142,655.77-196,862.56-78,992.20

Finding the Fourth Proportional to 142,655.77, 196,862.56 and 78,992.20

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Solution

The fourth proportional to 142,655.77, 196,862.56 and 78,992.20 is: 109,007.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,655.77 : 196,862.56 = 78,992.20 : x
  2. Step 2: Convert to fraction form
    142,655.77/196,862.56 = 78,992.20/x
  3. Step 3: Cross multiply
    142,655.77x = 196,862.56 × 78,992.20
  4. Step 4: Simplify right side
    142,655.77x = 15,550,606,317.07
  5. Step 5: Solve for x
    x = 15,550,606,317.07/142,655.77
  6. Step 6: Final answer
    x = 109,007.90

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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.