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Finding the Fourth Proportional to 210,607.83, 315,911.78 and 70,366.46

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Solution

The fourth proportional to 210,607.83, 315,911.78 and 70,366.46 is: 105,549.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,607.83 : 315,911.78 = 70,366.46 : x
  2. Step 2: Convert to fraction form
    210,607.83/315,911.78 = 70,366.46/x
  3. Step 3: Cross multiply
    210,607.83x = 315,911.78 × 70,366.46
  4. Step 4: Simplify right side
    210,607.83x = 22,229,591,699.51
  5. Step 5: Solve for x
    x = 22,229,591,699.51/210,607.83
  6. Step 6: Final answer
    x = 105,549.69

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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.