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Finding the Fourth Proportional to 98,797.88, 136,339.80 and 56,357.12

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Solution

The fourth proportional to 98,797.88, 136,339.80 and 56,357.12 is: 77,772.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,797.88 : 136,339.80 = 56,357.12 : x
  2. Step 2: Convert to fraction form
    98,797.88/136,339.80 = 56,357.12/x
  3. Step 3: Cross multiply
    98,797.88x = 136,339.80 × 56,357.12
  4. Step 4: Simplify right side
    98,797.88x = 7,683,718,469.38
  5. Step 5: Solve for x
    x = 7,683,718,469.38/98,797.88
  6. Step 6: Final answer
    x = 77,772.10

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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.