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Finding the Fourth Proportional to 113,686.92, 156,795.47 and 100,045.51

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Solution

The fourth proportional to 113,686.92, 156,795.47 and 100,045.51 is: 137,981.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,686.92 : 156,795.47 = 100,045.51 : x
  2. Step 2: Convert to fraction form
    113,686.92/156,795.47 = 100,045.51/x
  3. Step 3: Cross multiply
    113,686.92x = 156,795.47 × 100,045.51
  4. Step 4: Simplify right side
    113,686.92x = 15,686,682,761.84
  5. Step 5: Solve for x
    x = 15,686,682,761.84/113,686.92
  6. Step 6: Final answer
    x = 137,981.42

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1.5x scale

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.