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Finding the Fourth Proportional to 85,365.74, 127,929.54 and 66,560.06

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Solution

The fourth proportional to 85,365.74, 127,929.54 and 66,560.06 is: 99,747.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,365.74 : 127,929.54 = 66,560.06 : x
  2. Step 2: Convert to fraction form
    85,365.74/127,929.54 = 66,560.06/x
  3. Step 3: Cross multiply
    85,365.74x = 127,929.54 × 66,560.06
  4. Step 4: Simplify right side
    85,365.74x = 8,514,997,858.17
  5. Step 5: Solve for x
    x = 8,514,997,858.17/85,365.74
  6. Step 6: Final answer
    x = 99,747.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.