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Finding the Fourth Proportional to 64,809.12, 89,443.80 and 40,934.64

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Solution

The fourth proportional to 64,809.12, 89,443.80 and 40,934.64 is: 56,494.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,809.12 : 89,443.80 = 40,934.64 : x
  2. Step 2: Convert to fraction form
    64,809.12/89,443.80 = 40,934.64/x
  3. Step 3: Cross multiply
    64,809.12x = 89,443.80 × 40,934.64
  4. Step 4: Simplify right side
    64,809.12x = 3,661,349,753.23
  5. Step 5: Solve for x
    x = 3,661,349,753.23/64,809.12
  6. Step 6: Final answer
    x = 56,494.36

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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.