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Finding the Fourth Proportional to 64,708.80, 89,294.40 and 36,412.80

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Solution

The fourth proportional to 64,708.80, 89,294.40 and 36,412.80 is: 50,247.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,708.80 : 89,294.40 = 36,412.80 : x
  2. Step 2: Convert to fraction form
    64,708.80/89,294.40 = 36,412.80/x
  3. Step 3: Cross multiply
    64,708.80x = 89,294.40 × 36,412.80
  4. Step 4: Simplify right side
    64,708.80x = 3,251,459,128.32
  5. Step 5: Solve for x
    x = 3,251,459,128.32/64,708.80
  6. Step 6: Final answer
    x = 50,247.56

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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.