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Finding the Fourth Proportional to 64,938.88, 89,616 and 35,130.88

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Solution

The fourth proportional to 64,938.88, 89,616 and 35,130.88 is: 48,480.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,938.88 : 89,616 = 35,130.88 : x
  2. Step 2: Convert to fraction form
    64,938.88/89,616 = 35,130.88/x
  3. Step 3: Cross multiply
    64,938.88x = 89,616 × 35,130.88
  4. Step 4: Simplify right side
    64,938.88x = 3,148,288,942.08
  5. Step 5: Solve for x
    x = 3,148,288,942.08/64,938.88
  6. Step 6: Final answer
    x = 48,480.80

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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.