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Finding the Third Proportional to 90,618 and 139,347.75

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Solution

The third proportional to 90,618 and 139,347.75 is: 214,281.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,618 : 139,347.75 = 139,347.75 : x
  2. Step 2: Convert to fraction form
    90,618/139,347.75 = 139,347.75/x
  3. Step 3: Cross multiply
    90,618x = 139,347.75 × 139,347.75
  4. Step 4: Simplify right side
    90,618x = 19,417,795,430.06
  5. Step 5: Solve for x
    x = 19,417,795,430.06/90,618
  6. Step 6: Final answer
    x = 214,281.88

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.