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Finding the Fourth Proportional to 153,588.63, 211,945.48 and 85,613.02

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Solution

The fourth proportional to 153,588.63, 211,945.48 and 85,613.02 is: 118,142.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,588.63 : 211,945.48 = 85,613.02 : x
  2. Step 2: Convert to fraction form
    153,588.63/211,945.48 = 85,613.02/x
  3. Step 3: Cross multiply
    153,588.63x = 211,945.48 × 85,613.02
  4. Step 4: Simplify right side
    153,588.63x = 18,145,292,618.15
  5. Step 5: Solve for x
    x = 18,145,292,618.15/153,588.63
  6. Step 6: Final answer
    x = 118,142.16

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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.