Home / 129,810.80-179,140.20-76,127.60

Finding the Fourth Proportional to 129,810.80, 179,140.20 and 76,127.60

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Solution

The fourth proportional to 129,810.80, 179,140.20 and 76,127.60 is: 105,056.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,810.80 : 179,140.20 = 76,127.60 : x
  2. Step 2: Convert to fraction form
    129,810.80/179,140.20 = 76,127.60/x
  3. Step 3: Cross multiply
    129,810.80x = 179,140.20 × 76,127.60
  4. Step 4: Simplify right side
    129,810.80x = 13,637,513,489.52
  5. Step 5: Solve for x
    x = 13,637,513,489.52/129,810.80
  6. Step 6: Final answer
    x = 105,056.85

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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.