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Finding the Fourth Proportional to 64,600.70, 89,153.95 and 38,760.21

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Solution

The fourth proportional to 64,600.70, 89,153.95 and 38,760.21 is: 53,492.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,600.70 : 89,153.95 = 38,760.21 : x
  2. Step 2: Convert to fraction form
    64,600.70/89,153.95 = 38,760.21/x
  3. Step 3: Cross multiply
    64,600.70x = 89,153.95 × 38,760.21
  4. Step 4: Simplify right side
    64,600.70x = 3,455,626,144.11
  5. Step 5: Solve for x
    x = 3,455,626,144.11/64,600.70
  6. Step 6: Final answer
    x = 53,492.09

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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.