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Finding the Fourth Proportional to 210,215.40, 315,135.56 and 77,064.56

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Solution

The fourth proportional to 210,215.40, 315,135.56 and 77,064.56 is: 115,528.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,215.40 : 315,135.56 = 77,064.56 : x
  2. Step 2: Convert to fraction form
    210,215.40/315,135.56 = 77,064.56/x
  3. Step 3: Cross multiply
    210,215.40x = 315,135.56 × 77,064.56
  4. Step 4: Simplify right side
    210,215.40x = 24,285,782,098.59
  5. Step 5: Solve for x
    x = 24,285,782,098.59/210,215.40
  6. Step 6: Final answer
    x = 115,528.09

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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.