Home / 142,655.12-196,861.64-78,991.55

Finding the Fourth Proportional to 142,655.12, 196,861.64 and 78,991.55

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Solution

The fourth proportional to 142,655.12, 196,861.64 and 78,991.55 is: 109,007.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,655.12 : 196,861.64 = 78,991.55 : x
  2. Step 2: Convert to fraction form
    142,655.12/196,861.64 = 78,991.55/x
  3. Step 3: Cross multiply
    142,655.12x = 196,861.64 × 78,991.55
  4. Step 4: Simplify right side
    142,655.12x = 15,550,406,989.78
  5. Step 5: Solve for x
    x = 15,550,406,989.78/142,655.12
  6. Step 6: Final answer
    x = 109,007.00

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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.