Home / 130,478.30-180,057-76,766.78

Finding the Fourth Proportional to 130,478.30, 180,057 and 76,766.78

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Solution

The fourth proportional to 130,478.30, 180,057 and 76,766.78 is: 105,936.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,478.30 : 180,057 = 76,766.78 : x
  2. Step 2: Convert to fraction form
    130,478.30/180,057 = 76,766.78/x
  3. Step 3: Cross multiply
    130,478.30x = 180,057 × 76,766.78
  4. Step 4: Simplify right side
    130,478.30x = 13,822,396,106.46
  5. Step 5: Solve for x
    x = 13,822,396,106.46/130,478.30
  6. Step 6: Final answer
    x = 105,936.36

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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.