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Finding the Fourth Proportional to 76,123.91, 105,043.88 and 45,490.92

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Solution

The fourth proportional to 76,123.91, 105,043.88 and 45,490.92 is: 62,773.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,123.91 : 105,043.88 = 45,490.92 : x
  2. Step 2: Convert to fraction form
    76,123.91/105,043.88 = 45,490.92/x
  3. Step 3: Cross multiply
    76,123.91x = 105,043.88 × 45,490.92
  4. Step 4: Simplify right side
    76,123.91x = 4,778,542,908.03
  5. Step 5: Solve for x
    x = 4,778,542,908.03/76,123.91
  6. Step 6: Final answer
    x = 62,773.22

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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.