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Finding the Fourth Proportional to 154,649, 213,416.03 and 90,156.53

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Solution

The fourth proportional to 154,649, 213,416.03 and 90,156.53 is: 124,416.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,649 : 213,416.03 = 90,156.53 : x
  2. Step 2: Convert to fraction form
    154,649/213,416.03 = 90,156.53/x
  3. Step 3: Cross multiply
    154,649x = 213,416.03 × 90,156.53
  4. Step 4: Simplify right side
    154,649x = 19,240,848,711.18
  5. Step 5: Solve for x
    x = 19,240,848,711.18/154,649
  6. Step 6: Final answer
    x = 124,416.25

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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.