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Finding the Fourth Proportional to 92,915.26, 128,233.82 and 87,215.10

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Solution

The fourth proportional to 92,915.26, 128,233.82 and 87,215.10 is: 120,366.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,915.26 : 128,233.82 = 87,215.10 : x
  2. Step 2: Convert to fraction form
    92,915.26/128,233.82 = 87,215.10/x
  3. Step 3: Cross multiply
    92,915.26x = 128,233.82 × 87,215.10
  4. Step 4: Simplify right side
    92,915.26x = 11,183,925,434.68
  5. Step 5: Solve for x
    x = 11,183,925,434.68/92,915.26
  6. Step 6: Final answer
    x = 120,366.94

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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.