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Finding the Fourth Proportional to 64,808.80, 89,464.80 and 47,783.68

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Solution

The fourth proportional to 64,808.80, 89,464.80 and 47,783.68 is: 65,962.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,808.80 : 89,464.80 = 47,783.68 : x
  2. Step 2: Convert to fraction form
    64,808.80/89,464.80 = 47,783.68/x
  3. Step 3: Cross multiply
    64,808.80x = 89,464.80 × 47,783.68
  4. Step 4: Simplify right side
    64,808.80x = 4,274,957,374.46
  5. Step 5: Solve for x
    x = 4,274,957,374.46/64,808.80
  6. Step 6: Final answer
    x = 65,962.61

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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.