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Finding the Fourth Proportional to 139,430.94, 209,905.08 and 127,030.65

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Solution

The fourth proportional to 139,430.94, 209,905.08 and 127,030.65 is: 191,237.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,430.94 : 209,905.08 = 127,030.65 : x
  2. Step 2: Convert to fraction form
    139,430.94/209,905.08 = 127,030.65/x
  3. Step 3: Cross multiply
    139,430.94x = 209,905.08 × 127,030.65
  4. Step 4: Simplify right side
    139,430.94x = 26,664,378,750.70
  5. Step 5: Solve for x
    x = 26,664,378,750.70/139,430.94
  6. Step 6: Final answer
    x = 191,237.17

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.