Home / 103,778.10-155,665.55-70,415.22

Finding the Fourth Proportional to 103,778.10, 155,665.55 and 70,415.22

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Solution

The fourth proportional to 103,778.10, 155,665.55 and 70,415.22 is: 105,621.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,778.10 : 155,665.55 = 70,415.22 : x
  2. Step 2: Convert to fraction form
    103,778.10/155,665.55 = 70,415.22/x
  3. Step 3: Cross multiply
    103,778.10x = 155,665.55 × 70,415.22
  4. Step 4: Simplify right side
    103,778.10x = 10,961,223,949.67
  5. Step 5: Solve for x
    x = 10,961,223,949.67/103,778.10
  6. Step 6: Final answer
    x = 105,621.74

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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.