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Finding the Fourth Proportional to 136,995.53, 189,075.86 and 86,015.54

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Solution

The fourth proportional to 136,995.53, 189,075.86 and 86,015.54 is: 118,715.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,995.53 : 189,075.86 = 86,015.54 : x
  2. Step 2: Convert to fraction form
    136,995.53/189,075.86 = 86,015.54/x
  3. Step 3: Cross multiply
    136,995.53x = 189,075.86 × 86,015.54
  4. Step 4: Simplify right side
    136,995.53x = 16,263,460,823.41
  5. Step 5: Solve for x
    x = 16,263,460,823.41/136,995.53
  6. Step 6: Final answer
    x = 118,715.27

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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.