Home / 78,210.14-107,930.52-42,400.71

Finding the Fourth Proportional to 78,210.14, 107,930.52 and 42,400.71

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Solution

The fourth proportional to 78,210.14, 107,930.52 and 42,400.71 is: 58,513.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,210.14 : 107,930.52 = 42,400.71 : x
  2. Step 2: Convert to fraction form
    78,210.14/107,930.52 = 42,400.71/x
  3. Step 3: Cross multiply
    78,210.14x = 107,930.52 × 42,400.71
  4. Step 4: Simplify right side
    78,210.14x = 4,576,330,678.67
  5. Step 5: Solve for x
    x = 4,576,330,678.67/78,210.14
  6. Step 6: Final answer
    x = 58,513.27

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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.