Home / 103,616.70-155,425.05-81,066.30

Finding the Fourth Proportional to 103,616.70, 155,425.05 and 81,066.30

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Solution

The fourth proportional to 103,616.70, 155,425.05 and 81,066.30 is: 121,599.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,616.70 : 155,425.05 = 81,066.30 : x
  2. Step 2: Convert to fraction form
    103,616.70/155,425.05 = 81,066.30/x
  3. Step 3: Cross multiply
    103,616.70x = 155,425.05 × 81,066.30
  4. Step 4: Simplify right side
    103,616.70x = 12,599,733,730.82
  5. Step 5: Solve for x
    x = 12,599,733,730.82/103,616.70
  6. Step 6: Final answer
    x = 121,599.45

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1.5x scale

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.