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Finding the Fourth Proportional to 145,963.56, 201,429.60 and 78,895.56

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Solution

The fourth proportional to 145,963.56, 201,429.60 and 78,895.56 is: 108,875.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,963.56 : 201,429.60 = 78,895.56 : x
  2. Step 2: Convert to fraction form
    145,963.56/201,429.60 = 78,895.56/x
  3. Step 3: Cross multiply
    145,963.56x = 201,429.60 × 78,895.56
  4. Step 4: Simplify right side
    145,963.56x = 15,891,901,092.58
  5. Step 5: Solve for x
    x = 15,891,901,092.58/145,963.56
  6. Step 6: Final answer
    x = 108,875.81

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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.