Home / 130,515-180,095.42-76,788.20

Finding the Fourth Proportional to 130,515, 180,095.42 and 76,788.20

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Solution

The fourth proportional to 130,515, 180,095.42 and 76,788.20 is: 105,958.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,515 : 180,095.42 = 76,788.20 : x
  2. Step 2: Convert to fraction form
    130,515/180,095.42 = 76,788.20/x
  3. Step 3: Cross multiply
    130,515x = 180,095.42 × 76,788.20
  4. Step 4: Simplify right side
    130,515x = 13,829,203,130.04
  5. Step 5: Solve for x
    x = 13,829,203,130.04/130,515
  6. Step 6: Final answer
    x = 105,958.73

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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.