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Finding the Fourth Proportional to 265,901.01, 398,851.29 and 78,912.51

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Solution

The fourth proportional to 265,901.01, 398,851.29 and 78,912.51 is: 118,368.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,901.01 : 398,851.29 = 78,912.51 : x
  2. Step 2: Convert to fraction form
    265,901.01/398,851.29 = 78,912.51/x
  3. Step 3: Cross multiply
    265,901.01x = 398,851.29 × 78,912.51
  4. Step 4: Simplify right side
    265,901.01x = 31,474,356,410.64
  5. Step 5: Solve for x
    x = 31,474,356,410.64/265,901.01
  6. Step 6: Final answer
    x = 118,368.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.