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Finding the Fourth Proportional to 90,486.84, 124,846.56 and 71,307.12

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Solution

The fourth proportional to 90,486.84, 124,846.56 and 71,307.12 is: 98,383.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,486.84 : 124,846.56 = 71,307.12 : x
  2. Step 2: Convert to fraction form
    90,486.84/124,846.56 = 71,307.12/x
  3. Step 3: Cross multiply
    90,486.84x = 124,846.56 × 71,307.12
  4. Step 4: Simplify right side
    90,486.84x = 8,902,448,635.51
  5. Step 5: Solve for x
    x = 8,902,448,635.51/90,486.84
  6. Step 6: Final answer
    x = 98,383.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.