Home / 124,619.40-186,929.10-72,131.40

Finding the Fourth Proportional to 124,619.40, 186,929.10 and 72,131.40

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Solution

The fourth proportional to 124,619.40, 186,929.10 and 72,131.40 is: 108,197.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,619.40 : 186,929.10 = 72,131.40 : x
  2. Step 2: Convert to fraction form
    124,619.40/186,929.10 = 72,131.40/x
  3. Step 3: Cross multiply
    124,619.40x = 186,929.10 × 72,131.40
  4. Step 4: Simplify right side
    124,619.40x = 13,483,457,683.74
  5. Step 5: Solve for x
    x = 13,483,457,683.74/124,619.40
  6. Step 6: Final answer
    x = 108,197.10

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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.