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Finding the Fourth Proportional to 64,920.78, 89,588.70 and 38,062.80

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Solution

The fourth proportional to 64,920.78, 89,588.70 and 38,062.80 is: 52,525.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,920.78 : 89,588.70 = 38,062.80 : x
  2. Step 2: Convert to fraction form
    64,920.78/89,588.70 = 38,062.80/x
  3. Step 3: Cross multiply
    64,920.78x = 89,588.70 × 38,062.80
  4. Step 4: Simplify right side
    64,920.78x = 3,409,996,770.36
  5. Step 5: Solve for x
    x = 3,409,996,770.36/64,920.78
  6. Step 6: Final answer
    x = 52,525.51

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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.