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Finding the Fourth Proportional to 121,695.60, 182,570.60 and 42,812.40

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Solution

The fourth proportional to 121,695.60, 182,570.60 and 42,812.40 is: 64,228.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,695.60 : 182,570.60 = 42,812.40 : x
  2. Step 2: Convert to fraction form
    121,695.60/182,570.60 = 42,812.40/x
  3. Step 3: Cross multiply
    121,695.60x = 182,570.60 × 42,812.40
  4. Step 4: Simplify right side
    121,695.60x = 7,816,285,555.44
  5. Step 5: Solve for x
    x = 7,816,285,555.44/121,695.60
  6. Step 6: Final answer
    x = 64,228.17

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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.