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Finding the Fourth Proportional to 92,872.40, 128,211.12 and 58,915.58

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Solution

The fourth proportional to 92,872.40, 128,211.12 and 58,915.58 is: 81,333.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,872.40 : 128,211.12 = 58,915.58 : x
  2. Step 2: Convert to fraction form
    92,872.40/128,211.12 = 58,915.58/x
  3. Step 3: Cross multiply
    92,872.40x = 128,211.12 × 58,915.58
  4. Step 4: Simplify right side
    92,872.40x = 7,553,631,856.19
  5. Step 5: Solve for x
    x = 7,553,631,856.19/92,872.40
  6. Step 6: Final answer
    x = 81,333.45

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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.