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Finding the Fourth Proportional to 91,292.64, 125,982.40 and 51,007.20

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Solution

The fourth proportional to 91,292.64, 125,982.40 and 51,007.20 is: 70,389.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,292.64 : 125,982.40 = 51,007.20 : x
  2. Step 2: Convert to fraction form
    91,292.64/125,982.40 = 51,007.20/x
  3. Step 3: Cross multiply
    91,292.64x = 125,982.40 × 51,007.20
  4. Step 4: Simplify right side
    91,292.64x = 6,426,009,473.28
  5. Step 5: Solve for x
    x = 6,426,009,473.28/91,292.64
  6. Step 6: Final answer
    x = 70,389.13

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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.