Home / 89,145.60-123,004.80-57,307.20

Finding the Fourth Proportional to 89,145.60, 123,004.80 and 57,307.20

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Solution

The fourth proportional to 89,145.60, 123,004.80 and 57,307.20 is: 79,073.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,145.60 : 123,004.80 = 57,307.20 : x
  2. Step 2: Convert to fraction form
    89,145.60/123,004.80 = 57,307.20/x
  3. Step 3: Cross multiply
    89,145.60x = 123,004.80 × 57,307.20
  4. Step 4: Simplify right side
    89,145.60x = 7,049,060,674.56
  5. Step 5: Solve for x
    x = 7,049,060,674.56/89,145.60
  6. Step 6: Final answer
    x = 79,073.57

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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.