Home / 142,687.09-196,919.40-79,030.81

Finding the Fourth Proportional to 142,687.09, 196,919.40 and 79,030.81

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Solution

The fourth proportional to 142,687.09, 196,919.40 and 79,030.81 is: 109,068.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,687.09 : 196,919.40 = 79,030.81 : x
  2. Step 2: Convert to fraction form
    142,687.09/196,919.40 = 79,030.81/x
  3. Step 3: Cross multiply
    142,687.09x = 196,919.40 × 79,030.81
  4. Step 4: Simplify right side
    142,687.09x = 15,562,699,686.71
  5. Step 5: Solve for x
    x = 15,562,699,686.71/142,687.09
  6. Step 6: Final answer
    x = 109,068.73

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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.