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Finding the Fourth Proportional to 102,292.80, 153,007.20 and 91,838.40

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Solution

The fourth proportional to 102,292.80, 153,007.20 and 91,838.40 is: 137,369.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,292.80 : 153,007.20 = 91,838.40 : x
  2. Step 2: Convert to fraction form
    102,292.80/153,007.20 = 91,838.40/x
  3. Step 3: Cross multiply
    102,292.80x = 153,007.20 × 91,838.40
  4. Step 4: Simplify right side
    102,292.80x = 14,051,936,436.48
  5. Step 5: Solve for x
    x = 14,051,936,436.48/102,292.80
  6. Step 6: Final answer
    x = 137,369.75

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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.