Home / 76,785.12-105,868.08-63,410.40

Finding the Fourth Proportional to 76,785.12, 105,868.08 and 63,410.40

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Solution

The fourth proportional to 76,785.12, 105,868.08 and 63,410.40 is: 87,427.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,785.12 : 105,868.08 = 63,410.40 : x
  2. Step 2: Convert to fraction form
    76,785.12/105,868.08 = 63,410.40/x
  3. Step 3: Cross multiply
    76,785.12x = 105,868.08 × 63,410.40
  4. Step 4: Simplify right side
    76,785.12x = 6,713,137,300.03
  5. Step 5: Solve for x
    x = 6,713,137,300.03/76,785.12
  6. Step 6: Final answer
    x = 87,427.58

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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.