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Finding the Fourth Proportional to 151,465.87, 208,964.77 and 91,051.21

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Solution

The fourth proportional to 151,465.87, 208,964.77 and 91,051.21 is: 125,615.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,465.87 : 208,964.77 = 91,051.21 : x
  2. Step 2: Convert to fraction form
    151,465.87/208,964.77 = 91,051.21/x
  3. Step 3: Cross multiply
    151,465.87x = 208,964.77 × 91,051.21
  4. Step 4: Simplify right side
    151,465.87x = 19,026,495,155.87
  5. Step 5: Solve for x
    x = 19,026,495,155.87/151,465.87
  6. Step 6: Final answer
    x = 125,615.73

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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.