Home / 85,448.51-128,172.36-47,479.89

Finding the Fourth Proportional to 85,448.51, 128,172.36 and 47,479.89

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Solution

The fourth proportional to 85,448.51, 128,172.36 and 47,479.89 is: 71,219.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,448.51 : 128,172.36 = 47,479.89 : x
  2. Step 2: Convert to fraction form
    85,448.51/128,172.36 = 47,479.89/x
  3. Step 3: Cross multiply
    85,448.51x = 128,172.36 × 47,479.89
  4. Step 4: Simplify right side
    85,448.51x = 6,085,609,553.84
  5. Step 5: Solve for x
    x = 6,085,609,553.84/85,448.51
  6. Step 6: Final answer
    x = 71,219.61

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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.