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Finding the Fourth Proportional to 92,881.32, 128,215.46 and 62,707.51

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Solution

The fourth proportional to 92,881.32, 128,215.46 and 62,707.51 is: 86,562.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,881.32 : 128,215.46 = 62,707.51 : x
  2. Step 2: Convert to fraction form
    92,881.32/128,215.46 = 62,707.51/x
  3. Step 3: Cross multiply
    92,881.32x = 128,215.46 × 62,707.51
  4. Step 4: Simplify right side
    92,881.32x = 8,040,072,240.10
  5. Step 5: Solve for x
    x = 8,040,072,240.10/92,881.32
  6. Step 6: Final answer
    x = 86,562.86

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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.