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Finding the Fourth Proportional to 64,887.40, 97,136.70 and 38,578.60

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Solution

The fourth proportional to 64,887.40, 97,136.70 and 38,578.60 is: 57,752.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,887.40 : 97,136.70 = 38,578.60 : x
  2. Step 2: Convert to fraction form
    64,887.40/97,136.70 = 38,578.60/x
  3. Step 3: Cross multiply
    64,887.40x = 97,136.70 × 38,578.60
  4. Step 4: Simplify right side
    64,887.40x = 3,747,397,894.62
  5. Step 5: Solve for x
    x = 3,747,397,894.62/64,887.40
  6. Step 6: Final answer
    x = 57,752.32

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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.