Home / 142,339.14-196,429.05-78,678.81

Finding the Fourth Proportional to 142,339.14, 196,429.05 and 78,678.81

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Solution

The fourth proportional to 142,339.14, 196,429.05 and 78,678.81 is: 108,577.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,339.14 : 196,429.05 = 78,678.81 : x
  2. Step 2: Convert to fraction form
    142,339.14/196,429.05 = 78,678.81/x
  3. Step 3: Cross multiply
    142,339.14x = 196,429.05 × 78,678.81
  4. Step 4: Simplify right side
    142,339.14x = 15,454,803,903.43
  5. Step 5: Solve for x
    x = 15,454,803,903.43/142,339.14
  6. Step 6: Final answer
    x = 108,577.33

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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.