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Finding the Fourth Proportional to 153,180.79, 211,492.21 and 136,997.80

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Solution

The fourth proportional to 153,180.79, 211,492.21 and 136,997.80 is: 189,148.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,180.79 : 211,492.21 = 136,997.80 : x
  2. Step 2: Convert to fraction form
    153,180.79/211,492.21 = 136,997.80/x
  3. Step 3: Cross multiply
    153,180.79x = 211,492.21 × 136,997.80
  4. Step 4: Simplify right side
    153,180.79x = 28,973,967,487.14
  5. Step 5: Solve for x
    x = 28,973,967,487.14/153,180.79
  6. Step 6: Final answer
    x = 189,148.83

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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.