Home / 105,139.21-145,087.05-59,812.93

Finding the Fourth Proportional to 105,139.21, 145,087.05 and 59,812.93

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Solution

The fourth proportional to 105,139.21, 145,087.05 and 59,812.93 is: 82,538.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,139.21 : 145,087.05 = 59,812.93 : x
  2. Step 2: Convert to fraction form
    105,139.21/145,087.05 = 59,812.93/x
  3. Step 3: Cross multiply
    105,139.21x = 145,087.05 × 59,812.93
  4. Step 4: Simplify right side
    105,139.21x = 8,678,081,565.56
  5. Step 5: Solve for x
    x = 8,678,081,565.56/105,139.21
  6. Step 6: Final answer
    x = 82,538.96

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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.