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Finding the Fourth Proportional to 85,653.46, 128,496.60 and 26,478.71

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Solution

The fourth proportional to 85,653.46, 128,496.60 and 26,478.71 is: 39,723.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,653.46 : 128,496.60 = 26,478.71 : x
  2. Step 2: Convert to fraction form
    85,653.46/128,496.60 = 26,478.71/x
  3. Step 3: Cross multiply
    85,653.46x = 128,496.60 × 26,478.71
  4. Step 4: Simplify right side
    85,653.46x = 3,402,424,046.77
  5. Step 5: Solve for x
    x = 3,402,424,046.77/85,653.46
  6. Step 6: Final answer
    x = 39,723.14

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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.