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Finding the Fourth Proportional to 100,585.61, 138,810.59 and 55,266.53

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Solution

The fourth proportional to 100,585.61, 138,810.59 and 55,266.53 is: 76,269.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,585.61 : 138,810.59 = 55,266.53 : x
  2. Step 2: Convert to fraction form
    100,585.61/138,810.59 = 55,266.53/x
  3. Step 3: Cross multiply
    100,585.61x = 138,810.59 × 55,266.53
  4. Step 4: Simplify right side
    100,585.61x = 7,671,579,393.96
  5. Step 5: Solve for x
    x = 7,671,579,393.96/100,585.61
  6. Step 6: Final answer
    x = 76,269.15

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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.