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Finding the Fourth Proportional to 153,254.80, 211,492.65 and 85,274.62

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Solution

The fourth proportional to 153,254.80, 211,492.65 and 85,274.62 is: 117,679.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,254.80 : 211,492.65 = 85,274.62 : x
  2. Step 2: Convert to fraction form
    153,254.80/211,492.65 = 85,274.62/x
  3. Step 3: Cross multiply
    153,254.80x = 211,492.65 × 85,274.62
  4. Step 4: Simplify right side
    153,254.80x = 18,034,955,361.54
  5. Step 5: Solve for x
    x = 18,034,955,361.54/153,254.80
  6. Step 6: Final answer
    x = 117,679.55

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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.