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Finding the Fourth Proportional to 153,739.25, 212,160.48 and 85,754.48

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Solution

The fourth proportional to 153,739.25, 212,160.48 and 85,754.48 is: 118,341.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,739.25 : 212,160.48 = 85,754.48 : x
  2. Step 2: Convert to fraction form
    153,739.25/212,160.48 = 85,754.48/x
  3. Step 3: Cross multiply
    153,739.25x = 212,160.48 × 85,754.48
  4. Step 4: Simplify right side
    153,739.25x = 18,193,710,578.15
  5. Step 5: Solve for x
    x = 18,193,710,578.15/153,739.25
  6. Step 6: Final answer
    x = 118,341.36

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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.