Home / 105,087.90-157,372.65-69,836.70

Finding the Fourth Proportional to 105,087.90, 157,372.65 and 69,836.70

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Solution

The fourth proportional to 105,087.90, 157,372.65 and 69,836.70 is: 104,582.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,087.90 : 157,372.65 = 69,836.70 : x
  2. Step 2: Convert to fraction form
    105,087.90/157,372.65 = 69,836.70/x
  3. Step 3: Cross multiply
    105,087.90x = 157,372.65 × 69,836.70
  4. Step 4: Simplify right side
    105,087.90x = 10,990,386,546.26
  5. Step 5: Solve for x
    x = 10,990,386,546.26/105,087.90
  6. Step 6: Final answer
    x = 104,582.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.