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Finding the Fourth Proportional to 153,503.60, 211,850.54 and 85,531.64

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Solution

The fourth proportional to 153,503.60, 211,850.54 and 85,531.64 is: 118,042.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,503.60 : 211,850.54 = 85,531.64 : x
  2. Step 2: Convert to fraction form
    153,503.60/211,850.54 = 85,531.64/x
  3. Step 3: Cross multiply
    153,503.60x = 211,850.54 × 85,531.64
  4. Step 4: Simplify right side
    153,503.60x = 18,119,922,634.17
  5. Step 5: Solve for x
    x = 18,119,922,634.17/153,503.60
  6. Step 6: Final answer
    x = 118,042.33

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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.