Home / 129,075.37-178,104.75-72,475.81

Finding the Fourth Proportional to 129,075.37, 178,104.75 and 72,475.81

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Solution

The fourth proportional to 129,075.37, 178,104.75 and 72,475.81 is: 100,005.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,075.37 : 178,104.75 = 72,475.81 : x
  2. Step 2: Convert to fraction form
    129,075.37/178,104.75 = 72,475.81/x
  3. Step 3: Cross multiply
    129,075.37x = 178,104.75 × 72,475.81
  4. Step 4: Simplify right side
    129,075.37x = 12,908,286,021.10
  5. Step 5: Solve for x
    x = 12,908,286,021.10/129,075.37
  6. Step 6: Final answer
    x = 100,005.80

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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.