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Finding the Fourth Proportional to 135,611.76, 187,139.16 and 75,991.92

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Solution

The fourth proportional to 135,611.76, 187,139.16 and 75,991.92 is: 104,866.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,611.76 : 187,139.16 = 75,991.92 : x
  2. Step 2: Convert to fraction form
    135,611.76/187,139.16 = 75,991.92/x
  3. Step 3: Cross multiply
    135,611.76x = 187,139.16 × 75,991.92
  4. Step 4: Simplify right side
    135,611.76x = 14,221,064,075.59
  5. Step 5: Solve for x
    x = 14,221,064,075.59/135,611.76
  6. Step 6: Final answer
    x = 104,866.01

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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.