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Finding the Fourth Proportional to 121,539.40, 169,761.50 and 121,539.40

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Solution

The fourth proportional to 121,539.40, 169,761.50 and 121,539.40 is: 169,761.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,539.40 : 169,761.50 = 121,539.40 : x
  2. Step 2: Convert to fraction form
    121,539.40/169,761.50 = 121,539.40/x
  3. Step 3: Cross multiply
    121,539.40x = 169,761.50 × 121,539.40
  4. Step 4: Simplify right side
    121,539.40x = 20,632,710,853.10
  5. Step 5: Solve for x
    x = 20,632,710,853.10/121,539.40
  6. Step 6: Final answer
    x = 169,761.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.