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Finding the Fourth Proportional to 81,404.49, 112,341.66 and 47,407.50

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Solution

The fourth proportional to 81,404.49, 112,341.66 and 47,407.50 is: 65,424.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,404.49 : 112,341.66 = 47,407.50 : x
  2. Step 2: Convert to fraction form
    81,404.49/112,341.66 = 47,407.50/x
  3. Step 3: Cross multiply
    81,404.49x = 112,341.66 × 47,407.50
  4. Step 4: Simplify right side
    81,404.49x = 5,325,837,246.45
  5. Step 5: Solve for x
    x = 5,325,837,246.45/81,404.49
  6. Step 6: Final answer
    x = 65,424.37

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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.