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Finding the Fourth Proportional to 85,842.84, 128,744.58 and 23,518.20

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Solution

The fourth proportional to 85,842.84, 128,744.58 and 23,518.20 is: 35,271.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,842.84 : 128,744.58 = 23,518.20 : x
  2. Step 2: Convert to fraction form
    85,842.84/128,744.58 = 23,518.20/x
  3. Step 3: Cross multiply
    85,842.84x = 128,744.58 × 23,518.20
  4. Step 4: Simplify right side
    85,842.84x = 3,027,840,781.36
  5. Step 5: Solve for x
    x = 3,027,840,781.36/85,842.84
  6. Step 6: Final answer
    x = 35,271.91

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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.