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Finding the Fourth Proportional to 64,986.70, 97,480.05 and 31,728.10

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Solution

The fourth proportional to 64,986.70, 97,480.05 and 31,728.10 is: 47,592.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,986.70 : 97,480.05 = 31,728.10 : x
  2. Step 2: Convert to fraction form
    64,986.70/97,480.05 = 31,728.10/x
  3. Step 3: Cross multiply
    64,986.70x = 97,480.05 × 31,728.10
  4. Step 4: Simplify right side
    64,986.70x = 3,092,856,774.41
  5. Step 5: Solve for x
    x = 3,092,856,774.41/64,986.70
  6. Step 6: Final answer
    x = 47,592.15

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1.5x scale

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.