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Finding the Fourth Proportional to 81,392.70, 112,316.58 and 45,574.50

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Solution

The fourth proportional to 81,392.70, 112,316.58 and 45,574.50 is: 62,889.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,392.70 : 112,316.58 = 45,574.50 : x
  2. Step 2: Convert to fraction form
    81,392.70/112,316.58 = 45,574.50/x
  3. Step 3: Cross multiply
    81,392.70x = 112,316.58 × 45,574.50
  4. Step 4: Simplify right side
    81,392.70x = 5,118,771,975.21
  5. Step 5: Solve for x
    x = 5,118,771,975.21/81,392.70
  6. Step 6: Final answer
    x = 62,889.82

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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.