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Finding the Fourth Proportional to 210,087.70, 315,095.10 and 76,899.40

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Solution

The fourth proportional to 210,087.70, 315,095.10 and 76,899.40 is: 115,335.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,087.70 : 315,095.10 = 76,899.40 : x
  2. Step 2: Convert to fraction form
    210,087.70/315,095.10 = 76,899.40/x
  3. Step 3: Cross multiply
    210,087.70x = 315,095.10 × 76,899.40
  4. Step 4: Simplify right side
    210,087.70x = 24,230,624,132.94
  5. Step 5: Solve for x
    x = 24,230,624,132.94/210,087.70
  6. Step 6: Final answer
    x = 115,335.76

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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.