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Finding the Fourth Proportional to 85,860.84, 128,792.34 and 26,695.20

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Solution

The fourth proportional to 85,860.84, 128,792.34 and 26,695.20 is: 40,043.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,860.84 : 128,792.34 = 26,695.20 : x
  2. Step 2: Convert to fraction form
    85,860.84/128,792.34 = 26,695.20/x
  3. Step 3: Cross multiply
    85,860.84x = 128,792.34 × 26,695.20
  4. Step 4: Simplify right side
    85,860.84x = 3,438,137,274.77
  5. Step 5: Solve for x
    x = 3,438,137,274.77/85,860.84
  6. Step 6: Final answer
    x = 40,043.14

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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.