Home / 153,971.32-212,433.93-89,428.09

Finding the Fourth Proportional to 153,971.32, 212,433.93 and 89,428.09

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Solution

The fourth proportional to 153,971.32, 212,433.93 and 89,428.09 is: 123,383.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,971.32 : 212,433.93 = 89,428.09 : x
  2. Step 2: Convert to fraction form
    153,971.32/212,433.93 = 89,428.09/x
  3. Step 3: Cross multiply
    153,971.32x = 212,433.93 × 89,428.09
  4. Step 4: Simplify right side
    153,971.32x = 18,997,560,611.09
  5. Step 5: Solve for x
    x = 18,997,560,611.09/153,971.32
  6. Step 6: Final answer
    x = 123,383.76

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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.