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Finding the Fourth Proportional to 85,642.76, 128,141.58 and 59,398.28

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Solution

The fourth proportional to 85,642.76, 128,141.58 and 59,398.28 is: 88,873.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,642.76 : 128,141.58 = 59,398.28 : x
  2. Step 2: Convert to fraction form
    85,642.76/128,141.58 = 59,398.28/x
  3. Step 3: Cross multiply
    85,642.76x = 128,141.58 × 59,398.28
  4. Step 4: Simplify right side
    85,642.76x = 7,611,389,448.48
  5. Step 5: Solve for x
    x = 7,611,389,448.48/85,642.76
  6. Step 6: Final answer
    x = 88,873.71

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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.