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Finding the Fourth Proportional to 153,774.72, 212,210.64 and 85,791.12

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Solution

The fourth proportional to 153,774.72, 212,210.64 and 85,791.12 is: 118,392.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,774.72 : 212,210.64 = 85,791.12 : x
  2. Step 2: Convert to fraction form
    153,774.72/212,210.64 = 85,791.12/x
  3. Step 3: Cross multiply
    153,774.72x = 212,210.64 × 85,791.12
  4. Step 4: Simplify right side
    153,774.72x = 18,205,788,481.52
  5. Step 5: Solve for x
    x = 18,205,788,481.52/153,774.72
  6. Step 6: Final answer
    x = 118,392.60

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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.