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Finding the Fourth Proportional to 81,392.83, 112,316.75 and 45,574.63

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Solution

The fourth proportional to 81,392.83, 112,316.75 and 45,574.63 is: 62,889.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,392.83 : 112,316.75 = 45,574.63 : x
  2. Step 2: Convert to fraction form
    81,392.83/112,316.75 = 45,574.63/x
  3. Step 3: Cross multiply
    81,392.83x = 112,316.75 × 45,574.63
  4. Step 4: Simplify right side
    81,392.83x = 5,118,793,876.41
  5. Step 5: Solve for x
    x = 5,118,793,876.41/81,392.83
  6. Step 6: Final answer
    x = 62,889.99

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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.