Home / 85,602.12-128,429.04-25,632.55

Finding the Fourth Proportional to 85,602.12, 128,429.04 and 25,632.55

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Solution

The fourth proportional to 85,602.12, 128,429.04 and 25,632.55 is: 38,456.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,602.12 : 128,429.04 = 25,632.55 : x
  2. Step 2: Convert to fraction form
    85,602.12/128,429.04 = 25,632.55/x
  3. Step 3: Cross multiply
    85,602.12x = 128,429.04 × 25,632.55
  4. Step 4: Simplify right side
    85,602.12x = 3,291,964,045.91
  5. Step 5: Solve for x
    x = 3,291,964,045.91/85,602.12
  6. Step 6: Final answer
    x = 38,456.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.