Home / 130,575.18-180,191.21-76,137.51

Finding the Fourth Proportional to 130,575.18, 180,191.21 and 76,137.51

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Solution

The fourth proportional to 130,575.18, 180,191.21 and 76,137.51 is: 105,068.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,575.18 : 180,191.21 = 76,137.51 : x
  2. Step 2: Convert to fraction form
    130,575.18/180,191.21 = 76,137.51/x
  3. Step 3: Cross multiply
    130,575.18x = 180,191.21 × 76,137.51
  4. Step 4: Simplify right side
    130,575.18x = 13,719,309,672.60
  5. Step 5: Solve for x
    x = 13,719,309,672.60/130,575.18
  6. Step 6: Final answer
    x = 105,068.28

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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.