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Finding the Fourth Proportional to 64,689.12, 89,271.18 and 36,394.20

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Solution

The fourth proportional to 64,689.12, 89,271.18 and 36,394.20 is: 50,224.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,689.12 : 89,271.18 = 36,394.20 : x
  2. Step 2: Convert to fraction form
    64,689.12/89,271.18 = 36,394.20/x
  3. Step 3: Cross multiply
    64,689.12x = 89,271.18 × 36,394.20
  4. Step 4: Simplify right side
    64,689.12x = 3,248,953,179.16
  5. Step 5: Solve for x
    x = 3,248,953,179.16/64,689.12
  6. Step 6: Final answer
    x = 50,224.11

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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.