Home / 85,506.24-128,843.04-70,265.28

Finding the Fourth Proportional to 85,506.24, 128,843.04 and 70,265.28

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Solution

The fourth proportional to 85,506.24, 128,843.04 and 70,265.28 is: 105,877.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,506.24 : 128,843.04 = 70,265.28 : x
  2. Step 2: Convert to fraction form
    85,506.24/128,843.04 = 70,265.28/x
  3. Step 3: Cross multiply
    85,506.24x = 128,843.04 × 70,265.28
  4. Step 4: Simplify right side
    85,506.24x = 9,053,192,281.65
  5. Step 5: Solve for x
    x = 9,053,192,281.65/85,506.24
  6. Step 6: Final answer
    x = 105,877.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.