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Finding the Fourth Proportional to 70,342.51, 97,081.91 and 40,120.91

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Solution

The fourth proportional to 70,342.51, 97,081.91 and 40,120.91 is: 55,372.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,342.51 : 97,081.91 = 40,120.91 : x
  2. Step 2: Convert to fraction form
    70,342.51/97,081.91 = 40,120.91/x
  3. Step 3: Cross multiply
    70,342.51x = 97,081.91 × 40,120.91
  4. Step 4: Simplify right side
    70,342.51x = 3,895,013,887.72
  5. Step 5: Solve for x
    x = 3,895,013,887.72/70,342.51
  6. Step 6: Final answer
    x = 55,372.12

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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.