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Finding the Fourth Proportional to 210,488.51, 315,728.29 and 68,333.56

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Solution

The fourth proportional to 210,488.51, 315,728.29 and 68,333.56 is: 102,498.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,488.51 : 315,728.29 = 68,333.56 : x
  2. Step 2: Convert to fraction form
    210,488.51/315,728.29 = 68,333.56/x
  3. Step 3: Cross multiply
    210,488.51x = 315,728.29 × 68,333.56
  4. Step 4: Simplify right side
    210,488.51x = 21,574,838,048.41
  5. Step 5: Solve for x
    x = 21,574,838,048.41/210,488.51
  6. Step 6: Final answer
    x = 102,498.89

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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.