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Finding the Fourth Proportional to 98,658.80, 136,122.90 and 56,216.42

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Solution

The fourth proportional to 98,658.80, 136,122.90 and 56,216.42 is: 77,563.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,658.80 : 136,122.90 = 56,216.42 : x
  2. Step 2: Convert to fraction form
    98,658.80/136,122.90 = 56,216.42/x
  3. Step 3: Cross multiply
    98,658.80x = 136,122.90 × 56,216.42
  4. Step 4: Simplify right side
    98,658.80x = 7,652,342,118.02
  5. Step 5: Solve for x
    x = 7,652,342,118.02/98,658.80
  6. Step 6: Final answer
    x = 77,563.71

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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.