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Finding the Fourth Proportional to 210,699.87, 315,983.93 and 70,425.69

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Solution

The fourth proportional to 210,699.87, 315,983.93 and 70,425.69 is: 105,616.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,699.87 : 315,983.93 = 70,425.69 : x
  2. Step 2: Convert to fraction form
    210,699.87/315,983.93 = 70,425.69/x
  3. Step 3: Cross multiply
    210,699.87x = 315,983.93 × 70,425.69
  4. Step 4: Simplify right side
    210,699.87x = 22,253,385,947.03
  5. Step 5: Solve for x
    x = 22,253,385,947.03/210,699.87
  6. Step 6: Final answer
    x = 105,616.51

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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.