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Finding the Fourth Proportional to 142,655.99, 196,862.87 and 78,992.42

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Solution

The fourth proportional to 142,655.99, 196,862.87 and 78,992.42 is: 109,008.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,655.99 : 196,862.87 = 78,992.42 : x
  2. Step 2: Convert to fraction form
    142,655.99/196,862.87 = 78,992.42/x
  3. Step 3: Cross multiply
    142,655.99x = 196,862.87 × 78,992.42
  4. Step 4: Simplify right side
    142,655.99x = 15,550,673,130.17
  5. Step 5: Solve for x
    x = 15,550,673,130.17/142,655.99
  6. Step 6: Final answer
    x = 109,008.21

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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.