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Finding the Fourth Proportional to 70,138.71, 105,210.18 and 22,752.51

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Solution

The fourth proportional to 70,138.71, 105,210.18 and 22,752.51 is: 34,129.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,138.71 : 105,210.18 = 22,752.51 : x
  2. Step 2: Convert to fraction form
    70,138.71/105,210.18 = 22,752.51/x
  3. Step 3: Cross multiply
    70,138.71x = 105,210.18 × 22,752.51
  4. Step 4: Simplify right side
    70,138.71x = 2,393,795,672.55
  5. Step 5: Solve for x
    x = 2,393,795,672.55/70,138.71
  6. Step 6: Final answer
    x = 34,129.45

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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.