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Finding the Fourth Proportional to 77,003.62, 115,509.51 and 21,603.94

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Solution

The fourth proportional to 77,003.62, 115,509.51 and 21,603.94 is: 32,407.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,003.62 : 115,509.51 = 21,603.94 : x
  2. Step 2: Convert to fraction form
    77,003.62/115,509.51 = 21,603.94/x
  3. Step 3: Cross multiply
    77,003.62x = 115,509.51 × 21,603.94
  4. Step 4: Simplify right side
    77,003.62x = 2,495,460,523.47
  5. Step 5: Solve for x
    x = 2,495,460,523.47/77,003.62
  6. Step 6: Final answer
    x = 32,407.05

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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.