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Finding the Fourth Proportional to 70,834.47, 97,720.74 and 40,612.86

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Solution

The fourth proportional to 70,834.47, 97,720.74 and 40,612.86 is: 56,028.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,834.47 : 97,720.74 = 40,612.86 : x
  2. Step 2: Convert to fraction form
    70,834.47/97,720.74 = 40,612.86/x
  3. Step 3: Cross multiply
    70,834.47x = 97,720.74 × 40,612.86
  4. Step 4: Simplify right side
    70,834.47x = 3,968,718,732.72
  5. Step 5: Solve for x
    x = 3,968,718,732.72/70,834.47
  6. Step 6: Final answer
    x = 56,028.07

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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.