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Finding the Fourth Proportional to 100,020.61, 137,963.41 and 64,153.81

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Solution

The fourth proportional to 100,020.61, 137,963.41 and 64,153.81 is: 88,490.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,020.61 : 137,963.41 = 64,153.81 : x
  2. Step 2: Convert to fraction form
    100,020.61/137,963.41 = 64,153.81/x
  3. Step 3: Cross multiply
    100,020.61x = 137,963.41 × 64,153.81
  4. Step 4: Simplify right side
    100,020.61x = 8,850,878,392.09
  5. Step 5: Solve for x
    x = 8,850,878,392.09/100,020.61
  6. Step 6: Final answer
    x = 88,490.55

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1.5x scale

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.