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Finding the Fourth Proportional to 210,701.50, 315,986.36 and 70,427.32

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Solution

The fourth proportional to 210,701.50, 315,986.36 and 70,427.32 is: 105,618.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,701.50 : 315,986.36 = 70,427.32 : x
  2. Step 2: Convert to fraction form
    210,701.50/315,986.36 = 70,427.32/x
  3. Step 3: Cross multiply
    210,701.50x = 315,986.36 × 70,427.32
  4. Step 4: Simplify right side
    210,701.50x = 22,254,072,491.36
  5. Step 5: Solve for x
    x = 22,254,072,491.36/210,701.50
  6. Step 6: Final answer
    x = 105,618.96

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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.