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Finding the Fourth Proportional to 100,905.63, 139,266.17 and 58,488.76

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Solution

The fourth proportional to 100,905.63, 139,266.17 and 58,488.76 is: 80,724.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,905.63 : 139,266.17 = 58,488.76 : x
  2. Step 2: Convert to fraction form
    100,905.63/139,266.17 = 58,488.76/x
  3. Step 3: Cross multiply
    100,905.63x = 139,266.17 × 58,488.76
  4. Step 4: Simplify right side
    100,905.63x = 8,145,505,593.25
  5. Step 5: Solve for x
    x = 8,145,505,593.25/100,905.63
  6. Step 6: Final answer
    x = 80,724.00

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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.