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Finding the Fourth Proportional to 64,890.40, 89,549.40 and 38,048.80

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Solution

The fourth proportional to 64,890.40, 89,549.40 and 38,048.80 is: 52,507.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,890.40 : 89,549.40 = 38,048.80 : x
  2. Step 2: Convert to fraction form
    64,890.40/89,549.40 = 38,048.80/x
  3. Step 3: Cross multiply
    64,890.40x = 89,549.40 × 38,048.80
  4. Step 4: Simplify right side
    64,890.40x = 3,407,247,210.72
  5. Step 5: Solve for x
    x = 3,407,247,210.72/64,890.40
  6. Step 6: Final answer
    x = 52,507.72

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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.