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Finding the Fourth Proportional to 85,809.02, 128,713.65 and 35,861.81

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Solution

The fourth proportional to 85,809.02, 128,713.65 and 35,861.81 is: 53,792.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,809.02 : 128,713.65 = 35,861.81 : x
  2. Step 2: Convert to fraction form
    85,809.02/128,713.65 = 35,861.81/x
  3. Step 3: Cross multiply
    85,809.02x = 128,713.65 × 35,861.81
  4. Step 4: Simplify right side
    85,809.02x = 4,615,904,460.71
  5. Step 5: Solve for x
    x = 4,615,904,460.71/85,809.02
  6. Step 6: Final answer
    x = 53,792.77

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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.