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Finding the Fourth Proportional to 85,588.80, 128,389.36 and 26,416.80

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Solution

The fourth proportional to 85,588.80, 128,389.36 and 26,416.80 is: 39,627.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,588.80 : 128,389.36 = 26,416.80 : x
  2. Step 2: Convert to fraction form
    85,588.80/128,389.36 = 26,416.80/x
  3. Step 3: Cross multiply
    85,588.80x = 128,389.36 × 26,416.80
  4. Step 4: Simplify right side
    85,588.80x = 3,391,636,045.25
  5. Step 5: Solve for x
    x = 3,391,636,045.25/85,588.80
  6. Step 6: Final answer
    x = 39,627.10

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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.