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Finding the Fourth Proportional to 64,684.50, 89,264.88 and 36,390.66

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Solution

The fourth proportional to 64,684.50, 89,264.88 and 36,390.66 is: 50,219.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,684.50 : 89,264.88 = 36,390.66 : x
  2. Step 2: Convert to fraction form
    64,684.50/89,264.88 = 36,390.66/x
  3. Step 3: Cross multiply
    64,684.50x = 89,264.88 × 36,390.66
  4. Step 4: Simplify right side
    64,684.50x = 3,248,407,898.02
  5. Step 5: Solve for x
    x = 3,248,407,898.02/64,684.50
  6. Step 6: Final answer
    x = 50,219.26

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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.