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Finding the Fourth Proportional to 85,812.98, 128,719.49 and 23,483.48

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Solution

The fourth proportional to 85,812.98, 128,719.49 and 23,483.48 is: 35,225.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,812.98 : 128,719.49 = 23,483.48 : x
  2. Step 2: Convert to fraction form
    85,812.98/128,719.49 = 23,483.48/x
  3. Step 3: Cross multiply
    85,812.98x = 128,719.49 × 23,483.48
  4. Step 4: Simplify right side
    85,812.98x = 3,022,780,808.01
  5. Step 5: Solve for x
    x = 3,022,780,808.01/85,812.98
  6. Step 6: Final answer
    x = 35,225.22

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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.