Home / 103,421.15-154,967.70-68,319.80

Finding the Fourth Proportional to 103,421.15, 154,967.70 and 68,319.80

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Solution

The fourth proportional to 103,421.15, 154,967.70 and 68,319.80 is: 102,371.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,421.15 : 154,967.70 = 68,319.80 : x
  2. Step 2: Convert to fraction form
    103,421.15/154,967.70 = 68,319.80/x
  3. Step 3: Cross multiply
    103,421.15x = 154,967.70 × 68,319.80
  4. Step 4: Simplify right side
    103,421.15x = 10,587,362,270.46
  5. Step 5: Solve for x
    x = 10,587,362,270.46/103,421.15
  6. Step 6: Final answer
    x = 102,371.35

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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.