Home / 130,683.78-180,315.78-76,949.16

Finding the Fourth Proportional to 130,683.78, 180,315.78 and 76,949.16

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Solution

The fourth proportional to 130,683.78, 180,315.78 and 76,949.16 is: 106,173.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,683.78 : 180,315.78 = 76,949.16 : x
  2. Step 2: Convert to fraction form
    130,683.78/180,315.78 = 76,949.16/x
  3. Step 3: Cross multiply
    130,683.78x = 180,315.78 × 76,949.16
  4. Step 4: Simplify right side
    130,683.78x = 13,875,147,805.74
  5. Step 5: Solve for x
    x = 13,875,147,805.74/130,683.78
  6. Step 6: Final answer
    x = 106,173.45

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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.