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Finding the Fourth Proportional to 153,718.08, 212,132.15 and 85,739.37

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Solution

The fourth proportional to 153,718.08, 212,132.15 and 85,739.37 is: 118,321.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,718.08 : 212,132.15 = 85,739.37 : x
  2. Step 2: Convert to fraction form
    153,718.08/212,132.15 = 85,739.37/x
  3. Step 3: Cross multiply
    153,718.08x = 212,132.15 × 85,739.37
  4. Step 4: Simplify right side
    153,718.08x = 18,188,076,897.75
  5. Step 5: Solve for x
    x = 18,188,076,897.75/153,718.08
  6. Step 6: Final answer
    x = 118,321.00

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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.