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Finding the Fourth Proportional to 85,846.90, 128,788.80 and 28,926.46

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Solution

The fourth proportional to 85,846.90, 128,788.80 and 28,926.46 is: 43,395.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,846.90 : 128,788.80 = 28,926.46 : x
  2. Step 2: Convert to fraction form
    85,846.90/128,788.80 = 28,926.46/x
  3. Step 3: Cross multiply
    85,846.90x = 128,788.80 × 28,926.46
  4. Step 4: Simplify right side
    85,846.90x = 3,725,404,071.65
  5. Step 5: Solve for x
    x = 3,725,404,071.65/85,846.90
  6. Step 6: Final answer
    x = 43,395.91

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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.