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Finding the Fourth Proportional to 115,376, 159,236.16 and 70,689.92

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Solution

The fourth proportional to 115,376, 159,236.16 and 70,689.92 is: 97,562.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,376 : 159,236.16 = 70,689.92 : x
  2. Step 2: Convert to fraction form
    115,376/159,236.16 = 70,689.92/x
  3. Step 3: Cross multiply
    115,376x = 159,236.16 × 70,689.92
  4. Step 4: Simplify right side
    115,376x = 11,256,391,411.51
  5. Step 5: Solve for x
    x = 11,256,391,411.51/115,376
  6. Step 6: Final answer
    x = 97,562.68

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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.