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Finding the Fourth Proportional to 127,140.39, 190,737.90 and 42,902.64

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Solution

The fourth proportional to 127,140.39, 190,737.90 and 42,902.64 is: 64,363.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,140.39 : 190,737.90 = 42,902.64 : x
  2. Step 2: Convert to fraction form
    127,140.39/190,737.90 = 42,902.64/x
  3. Step 3: Cross multiply
    127,140.39x = 190,737.90 × 42,902.64
  4. Step 4: Simplify right side
    127,140.39x = 8,183,159,458.06
  5. Step 5: Solve for x
    x = 8,183,159,458.06/127,140.39
  6. Step 6: Final answer
    x = 64,363.18

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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.