Home / 103,905.18-143,389.17-56,158.38

Finding the Fourth Proportional to 103,905.18, 143,389.17 and 56,158.38

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Solution

The fourth proportional to 103,905.18, 143,389.17 and 56,158.38 is: 77,498.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,905.18 : 143,389.17 = 56,158.38 : x
  2. Step 2: Convert to fraction form
    103,905.18/143,389.17 = 56,158.38/x
  3. Step 3: Cross multiply
    103,905.18x = 143,389.17 × 56,158.38
  4. Step 4: Simplify right side
    103,905.18x = 8,052,503,496.74
  5. Step 5: Solve for x
    x = 8,052,503,496.74/103,905.18
  6. Step 6: Final answer
    x = 77,498.58

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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.