Home / 105,355.49-145,389.64-57,609.18

Finding the Fourth Proportional to 105,355.49, 145,389.64 and 57,609.18

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Solution

The fourth proportional to 105,355.49, 145,389.64 and 57,609.18 is: 79,500.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,355.49 : 145,389.64 = 57,609.18 : x
  2. Step 2: Convert to fraction form
    105,355.49/145,389.64 = 57,609.18/x
  3. Step 3: Cross multiply
    105,355.49x = 145,389.64 × 57,609.18
  4. Step 4: Simplify right side
    105,355.49x = 8,375,777,940.90
  5. Step 5: Solve for x
    x = 8,375,777,940.90/105,355.49
  6. Step 6: Final answer
    x = 79,500.16

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1.5x scale

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.