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Finding the Fourth Proportional to 98,850.16, 136,415.10 and 54,138.16

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Solution

The fourth proportional to 98,850.16, 136,415.10 and 54,138.16 is: 74,711.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,850.16 : 136,415.10 = 54,138.16 : x
  2. Step 2: Convert to fraction form
    98,850.16/136,415.10 = 54,138.16/x
  3. Step 3: Cross multiply
    98,850.16x = 136,415.10 × 54,138.16
  4. Step 4: Simplify right side
    98,850.16x = 7,385,262,510.22
  5. Step 5: Solve for x
    x = 7,385,262,510.22/98,850.16
  6. Step 6: Final answer
    x = 74,711.69

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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.