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Finding the Fourth Proportional to 86,895, 119,915.10 and 47,151

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Solution

The fourth proportional to 86,895, 119,915.10 and 47,151 is: 65,068.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,895 : 119,915.10 = 47,151 : x
  2. Step 2: Convert to fraction form
    86,895/119,915.10 = 47,151/x
  3. Step 3: Cross multiply
    86,895x = 119,915.10 × 47,151
  4. Step 4: Simplify right side
    86,895x = 5,654,116,880.10
  5. Step 5: Solve for x
    x = 5,654,116,880.10/86,895
  6. Step 6: Final answer
    x = 65,068.38

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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.