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Finding the Fourth Proportional to 64,700.20, 89,281.42 and 36,400.42

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Solution

The fourth proportional to 64,700.20, 89,281.42 and 36,400.42 is: 50,229.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,700.20 : 89,281.42 = 36,400.42 : x
  2. Step 2: Convert to fraction form
    64,700.20/89,281.42 = 36,400.42/x
  3. Step 3: Cross multiply
    64,700.20x = 89,281.42 × 36,400.42
  4. Step 4: Simplify right side
    64,700.20x = 3,249,881,186.20
  5. Step 5: Solve for x
    x = 3,249,881,186.20/64,700.20
  6. Step 6: Final answer
    x = 50,229.85

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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.