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Finding the Fourth Proportional to 99,853.92, 137,798.40 and 57,420.80

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Solution

The fourth proportional to 99,853.92, 137,798.40 and 57,420.80 is: 79,240.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,853.92 : 137,798.40 = 57,420.80 : x
  2. Step 2: Convert to fraction form
    99,853.92/137,798.40 = 57,420.80/x
  3. Step 3: Cross multiply
    99,853.92x = 137,798.40 × 57,420.80
  4. Step 4: Simplify right side
    99,853.92x = 7,912,494,366.72
  5. Step 5: Solve for x
    x = 7,912,494,366.72/99,853.92
  6. Step 6: Final answer
    x = 79,240.70

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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.