Home / 100,436.15-138,602.10-55,114.49

Finding the Fourth Proportional to 100,436.15, 138,602.10 and 55,114.49

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Solution

The fourth proportional to 100,436.15, 138,602.10 and 55,114.49 is: 76,058.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,436.15 : 138,602.10 = 55,114.49 : x
  2. Step 2: Convert to fraction form
    100,436.15/138,602.10 = 55,114.49/x
  3. Step 3: Cross multiply
    100,436.15x = 138,602.10 × 55,114.49
  4. Step 4: Simplify right side
    100,436.15x = 7,638,984,607.61
  5. Step 5: Solve for x
    x = 7,638,984,607.61/100,436.15
  6. Step 6: Final answer
    x = 76,058.12

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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.