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Finding the Fourth Proportional to 100,725.62, 139,001.69 and 55,406.39

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Solution

The fourth proportional to 100,725.62, 139,001.69 and 55,406.39 is: 76,461.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,725.62 : 139,001.69 = 55,406.39 : x
  2. Step 2: Convert to fraction form
    100,725.62/139,001.69 = 55,406.39/x
  3. Step 3: Cross multiply
    100,725.62x = 139,001.69 × 55,406.39
  4. Step 4: Simplify right side
    100,725.62x = 7,701,581,569.77
  5. Step 5: Solve for x
    x = 7,701,581,569.77/100,725.62
  6. Step 6: Final answer
    x = 76,461.00

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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.