Home / 142,129.60-196,111.20-99,620.80

Finding the Fourth Proportional to 142,129.60, 196,111.20 and 99,620.80

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Solution

The fourth proportional to 142,129.60, 196,111.20 and 99,620.80 is: 137,457.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,129.60 : 196,111.20 = 99,620.80 : x
  2. Step 2: Convert to fraction form
    142,129.60/196,111.20 = 99,620.80/x
  3. Step 3: Cross multiply
    142,129.60x = 196,111.20 × 99,620.80
  4. Step 4: Simplify right side
    142,129.60x = 19,536,754,632.96
  5. Step 5: Solve for x
    x = 19,536,754,632.96/142,129.60
  6. Step 6: Final answer
    x = 137,457.33

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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.