Home / 100,334.45-138,358.18-70,108.74

Finding the Fourth Proportional to 100,334.45, 138,358.18 and 70,108.74

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Solution

The fourth proportional to 100,334.45, 138,358.18 and 70,108.74 is: 96,677.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,334.45 : 138,358.18 = 70,108.74 : x
  2. Step 2: Convert to fraction form
    100,334.45/138,358.18 = 70,108.74/x
  3. Step 3: Cross multiply
    100,334.45x = 138,358.18 × 70,108.74
  4. Step 4: Simplify right side
    100,334.45x = 9,700,117,361.77
  5. Step 5: Solve for x
    x = 9,700,117,361.77/100,334.45
  6. Step 6: Final answer
    x = 96,677.84

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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.