Home / 100,970.12-139,318.30-63,222.50

Finding the Fourth Proportional to 100,970.12, 139,318.30 and 63,222.50

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Solution

The fourth proportional to 100,970.12, 139,318.30 and 63,222.50 is: 87,234.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,970.12 : 139,318.30 = 63,222.50 : x
  2. Step 2: Convert to fraction form
    100,970.12/139,318.30 = 63,222.50/x
  3. Step 3: Cross multiply
    100,970.12x = 139,318.30 × 63,222.50
  4. Step 4: Simplify right side
    100,970.12x = 8,808,051,221.75
  5. Step 5: Solve for x
    x = 8,808,051,221.75/100,970.12
  6. Step 6: Final answer
    x = 87,234.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.