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Finding the Fourth Proportional to 102,995.70, 154,493.55 and 74,783.40

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Solution

The fourth proportional to 102,995.70, 154,493.55 and 74,783.40 is: 112,175.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,995.70 : 154,493.55 = 74,783.40 : x
  2. Step 2: Convert to fraction form
    102,995.70/154,493.55 = 74,783.40/x
  3. Step 3: Cross multiply
    102,995.70x = 154,493.55 × 74,783.40
  4. Step 4: Simplify right side
    102,995.70x = 11,553,552,947.07
  5. Step 5: Solve for x
    x = 11,553,552,947.07/102,995.70
  6. Step 6: Final answer
    x = 112,175.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.