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Finding the Fourth Proportional to 105,141.52, 145,073.64 and 60,420.88

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Solution

The fourth proportional to 105,141.52, 145,073.64 and 60,420.88 is: 83,368.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,141.52 : 145,073.64 = 60,420.88 : x
  2. Step 2: Convert to fraction form
    105,141.52/145,073.64 = 60,420.88/x
  3. Step 3: Cross multiply
    105,141.52x = 145,073.64 × 60,420.88
  4. Step 4: Simplify right side
    105,141.52x = 8,765,476,993.60
  5. Step 5: Solve for x
    x = 8,765,476,993.60/105,141.52
  6. Step 6: Final answer
    x = 83,368.37

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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.