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Finding the Fourth Proportional to 81,445.84, 112,392.54 and 45,145.76

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Solution

The fourth proportional to 81,445.84, 112,392.54 and 45,145.76 is: 62,299.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,445.84 : 112,392.54 = 45,145.76 : x
  2. Step 2: Convert to fraction form
    81,445.84/112,392.54 = 45,145.76/x
  3. Step 3: Cross multiply
    81,445.84x = 112,392.54 × 45,145.76
  4. Step 4: Simplify right side
    81,445.84x = 5,074,046,636.63
  5. Step 5: Solve for x
    x = 5,074,046,636.63/81,445.84
  6. Step 6: Final answer
    x = 62,299.64

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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.