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Finding the Fourth Proportional to 85,551.89, 128,342.40 and 26,376.53

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Solution

The fourth proportional to 85,551.89, 128,342.40 and 26,376.53 is: 39,569.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,551.89 : 128,342.40 = 26,376.53 : x
  2. Step 2: Convert to fraction form
    85,551.89/128,342.40 = 26,376.53/x
  3. Step 3: Cross multiply
    85,551.89x = 128,342.40 × 26,376.53
  4. Step 4: Simplify right side
    85,551.89x = 3,385,226,522.16
  5. Step 5: Solve for x
    x = 3,385,226,522.16/85,551.89
  6. Step 6: Final answer
    x = 39,569.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.