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Finding the Fourth Proportional to 124,457.81, 171,764.74 and 76,709.93

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Solution

The fourth proportional to 124,457.81, 171,764.74 and 76,709.93 is: 105,867.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,457.81 : 171,764.74 = 76,709.93 : x
  2. Step 2: Convert to fraction form
    124,457.81/171,764.74 = 76,709.93/x
  3. Step 3: Cross multiply
    124,457.81x = 171,764.74 × 76,709.93
  4. Step 4: Simplify right side
    124,457.81x = 13,176,061,707.17
  5. Step 5: Solve for x
    x = 13,176,061,707.17/124,457.81
  6. Step 6: Final answer
    x = 105,867.69

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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.