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Finding the Fourth Proportional to 83,455.98, 115,135.47 and 47,638.86

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Solution

The fourth proportional to 83,455.98, 115,135.47 and 47,638.86 is: 65,722.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,455.98 : 115,135.47 = 47,638.86 : x
  2. Step 2: Convert to fraction form
    83,455.98/115,135.47 = 47,638.86/x
  3. Step 3: Cross multiply
    83,455.98x = 115,135.47 × 47,638.86
  4. Step 4: Simplify right side
    83,455.98x = 5,484,922,536.36
  5. Step 5: Solve for x
    x = 5,484,922,536.36/83,455.98
  6. Step 6: Final answer
    x = 65,722.34

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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.