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Finding the Third Proportional to 128,681.75 and 185,639.25

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Solution

The third proportional to 128,681.75 and 185,639.25 is: 267,807.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,681.75 : 185,639.25 = 185,639.25 : x
  2. Step 2: Convert to fraction form
    128,681.75/185,639.25 = 185,639.25/x
  3. Step 3: Cross multiply
    128,681.75x = 185,639.25 × 185,639.25
  4. Step 4: Simplify right side
    128,681.75x = 34,461,931,140.56
  5. Step 5: Solve for x
    x = 34,461,931,140.56/128,681.75
  6. Step 6: Final answer
    x = 267,807.45

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Why These Related Problems?

These problems maintain the same ratio (1.44) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.