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Finding the Fourth Proportional to 118,085.78, 177,090.14 and 39,178.82

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Solution

The fourth proportional to 118,085.78, 177,090.14 and 39,178.82 is: 58,755.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,085.78 : 177,090.14 = 39,178.82 : x
  2. Step 2: Convert to fraction form
    118,085.78/177,090.14 = 39,178.82/x
  3. Step 3: Cross multiply
    118,085.78x = 177,090.14 × 39,178.82
  4. Step 4: Simplify right side
    118,085.78x = 6,938,182,718.83
  5. Step 5: Solve for x
    x = 6,938,182,718.83/118,085.78
  6. Step 6: Final answer
    x = 58,755.45

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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.