Home / 100,423.18-138,457.90-73,518.98

Finding the Fourth Proportional to 100,423.18, 138,457.90 and 73,518.98

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Solution

The fourth proportional to 100,423.18, 138,457.90 and 73,518.98 is: 101,363.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,423.18 : 138,457.90 = 73,518.98 : x
  2. Step 2: Convert to fraction form
    100,423.18/138,457.90 = 73,518.98/x
  3. Step 3: Cross multiply
    100,423.18x = 138,457.90 × 73,518.98
  4. Step 4: Simplify right side
    100,423.18x = 10,179,284,100.16
  5. Step 5: Solve for x
    x = 10,179,284,100.16/100,423.18
  6. Step 6: Final answer
    x = 101,363.89

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1.5x scale

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.