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Finding the Fourth Proportional to 100,437.67, 138,599.29 and 55,114.51

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Solution

The fourth proportional to 100,437.67, 138,599.29 and 55,114.51 is: 76,055.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,437.67 : 138,599.29 = 55,114.51 : x
  2. Step 2: Convert to fraction form
    100,437.67/138,599.29 = 55,114.51/x
  3. Step 3: Cross multiply
    100,437.67x = 138,599.29 × 55,114.51
  4. Step 4: Simplify right side
    100,437.67x = 7,638,831,954.70
  5. Step 5: Solve for x
    x = 7,638,831,954.70/100,437.67
  6. Step 6: Final answer
    x = 76,055.45

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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.