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Finding the Fourth Proportional to 74,521, 102,786.90 and 49,019.32

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Solution

The fourth proportional to 74,521, 102,786.90 and 49,019.32 is: 67,612.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,521 : 102,786.90 = 49,019.32 : x
  2. Step 2: Convert to fraction form
    74,521/102,786.90 = 49,019.32/x
  3. Step 3: Cross multiply
    74,521x = 102,786.90 × 49,019.32
  4. Step 4: Simplify right side
    74,521x = 5,038,543,942.91
  5. Step 5: Solve for x
    x = 5,038,543,942.91/74,521
  6. Step 6: Final answer
    x = 67,612.40

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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.