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Finding the Fourth Proportional to 118,702.16, 163,810.92 and 64,986.28

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Solution

The fourth proportional to 118,702.16, 163,810.92 and 64,986.28 is: 89,682.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,702.16 : 163,810.92 = 64,986.28 : x
  2. Step 2: Convert to fraction form
    118,702.16/163,810.92 = 64,986.28/x
  3. Step 3: Cross multiply
    118,702.16x = 163,810.92 × 64,986.28
  4. Step 4: Simplify right side
    118,702.16x = 10,645,462,314.18
  5. Step 5: Solve for x
    x = 10,645,462,314.18/118,702.16
  6. Step 6: Final answer
    x = 89,682.13

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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.