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Finding the Fourth Proportional to 118,749.17, 163,870.19 and 65,032.81

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Solution

The fourth proportional to 118,749.17, 163,870.19 and 65,032.81 is: 89,743.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,749.17 : 163,870.19 = 65,032.81 : x
  2. Step 2: Convert to fraction form
    118,749.17/163,870.19 = 65,032.81/x
  3. Step 3: Cross multiply
    118,749.17x = 163,870.19 × 65,032.81
  4. Step 4: Simplify right side
    118,749.17x = 10,656,938,439.97
  5. Step 5: Solve for x
    x = 10,656,938,439.97/118,749.17
  6. Step 6: Final answer
    x = 89,743.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.