Home / 112,855.71-155,715.29-76,562.10

Finding the Fourth Proportional to 112,855.71, 155,715.29 and 76,562.10

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Solution

The fourth proportional to 112,855.71, 155,715.29 and 76,562.10 is: 105,638.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,855.71 : 155,715.29 = 76,562.10 : x
  2. Step 2: Convert to fraction form
    112,855.71/155,715.29 = 76,562.10/x
  3. Step 3: Cross multiply
    112,855.71x = 155,715.29 × 76,562.10
  4. Step 4: Simplify right side
    112,855.71x = 11,921,889,074.50
  5. Step 5: Solve for x
    x = 11,921,889,074.50/112,855.71
  6. Step 6: Final answer
    x = 105,638.34

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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.