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Finding the Fourth Proportional to 85,662.40, 128,498.64 and 33,072.16

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Solution

The fourth proportional to 85,662.40, 128,498.64 and 33,072.16 is: 49,610.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,662.40 : 128,498.64 = 33,072.16 : x
  2. Step 2: Convert to fraction form
    85,662.40/128,498.64 = 33,072.16/x
  3. Step 3: Cross multiply
    85,662.40x = 128,498.64 × 33,072.16
  4. Step 4: Simplify right side
    85,662.40x = 4,249,727,581.86
  5. Step 5: Solve for x
    x = 4,249,727,581.86/85,662.40
  6. Step 6: Final answer
    x = 49,610.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.