Home / 78,397.15-117,561.71-28,460.65

Finding the Fourth Proportional to 78,397.15, 117,561.71 and 28,460.65

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Solution

The fourth proportional to 78,397.15, 117,561.71 and 28,460.65 is: 42,678.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,397.15 : 117,561.71 = 28,460.65 : x
  2. Step 2: Convert to fraction form
    78,397.15/117,561.71 = 28,460.65/x
  3. Step 3: Cross multiply
    78,397.15x = 117,561.71 × 28,460.65
  4. Step 4: Simplify right side
    78,397.15x = 3,345,882,539.41
  5. Step 5: Solve for x
    x = 3,345,882,539.41/78,397.15
  6. Step 6: Final answer
    x = 42,678.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.