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Finding the Fourth Proportional to 70,488.08, 105,721.13 and 20,562.95

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Solution

The fourth proportional to 70,488.08, 105,721.13 and 20,562.95 is: 30,841.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,488.08 : 105,721.13 = 20,562.95 : x
  2. Step 2: Convert to fraction form
    70,488.08/105,721.13 = 20,562.95/x
  3. Step 3: Cross multiply
    70,488.08x = 105,721.13 × 20,562.95
  4. Step 4: Simplify right side
    70,488.08x = 2,173,937,678.71
  5. Step 5: Solve for x
    x = 2,173,937,678.71/70,488.08
  6. Step 6: Final answer
    x = 30,841.21

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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.