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Finding the Fourth Proportional to 153,209.86, 211,343.28 and 91,940.20

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Solution

The fourth proportional to 153,209.86, 211,343.28 and 91,940.20 is: 126,825.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,209.86 : 211,343.28 = 91,940.20 : x
  2. Step 2: Convert to fraction form
    153,209.86/211,343.28 = 91,940.20/x
  3. Step 3: Cross multiply
    153,209.86x = 211,343.28 × 91,940.20
  4. Step 4: Simplify right side
    153,209.86x = 19,430,943,431.86
  5. Step 5: Solve for x
    x = 19,430,943,431.86/153,209.86
  6. Step 6: Final answer
    x = 126,825.67

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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.