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Finding the Fourth Proportional to 70,339.72, 97,078.05 and 40,118.12

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Solution

The fourth proportional to 70,339.72, 97,078.05 and 40,118.12 is: 55,368.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,339.72 : 97,078.05 = 40,118.12 : x
  2. Step 2: Convert to fraction form
    70,339.72/97,078.05 = 40,118.12/x
  3. Step 3: Cross multiply
    70,339.72x = 97,078.05 × 40,118.12
  4. Step 4: Simplify right side
    70,339.72x = 3,894,588,173.29
  5. Step 5: Solve for x
    x = 3,894,588,173.29/70,339.72
  6. Step 6: Final answer
    x = 55,368.27

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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.