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Finding the Fourth Proportional to 90,842.30, 127,282.90 and 90,842.30

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Solution

The fourth proportional to 90,842.30, 127,282.90 and 90,842.30 is: 127,282.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,842.30 : 127,282.90 = 90,842.30 : x
  2. Step 2: Convert to fraction form
    90,842.30/127,282.90 = 90,842.30/x
  3. Step 3: Cross multiply
    90,842.30x = 127,282.90 × 90,842.30
  4. Step 4: Simplify right side
    90,842.30x = 11,562,671,386.67
  5. Step 5: Solve for x
    x = 11,562,671,386.67/90,842.30
  6. Step 6: Final answer
    x = 127,282.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.