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Finding the Fourth Proportional to 100,368.96, 138,511.08 and 55,044.24

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Solution

The fourth proportional to 100,368.96, 138,511.08 and 55,044.24 is: 75,962.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,368.96 : 138,511.08 = 55,044.24 : x
  2. Step 2: Convert to fraction form
    100,368.96/138,511.08 = 55,044.24/x
  3. Step 3: Cross multiply
    100,368.96x = 138,511.08 × 55,044.24
  4. Step 4: Simplify right side
    100,368.96x = 7,624,237,130.18
  5. Step 5: Solve for x
    x = 7,624,237,130.18/100,368.96
  6. Step 6: Final answer
    x = 75,962.10

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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.