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Finding the Fourth Proportional to 105,752.50, 145,944.21 and 61,054.90

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Solution

The fourth proportional to 105,752.50, 145,944.21 and 61,054.90 is: 84,259.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,752.50 : 145,944.21 = 61,054.90 : x
  2. Step 2: Convert to fraction form
    105,752.50/145,944.21 = 61,054.90/x
  3. Step 3: Cross multiply
    105,752.50x = 145,944.21 × 61,054.90
  4. Step 4: Simplify right side
    105,752.50x = 8,910,609,147.13
  5. Step 5: Solve for x
    x = 8,910,609,147.13/105,752.50
  6. Step 6: Final answer
    x = 84,259.09

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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.