Home / 130,900.61-180,642.86-72,757.35

Finding the Fourth Proportional to 130,900.61, 180,642.86 and 72,757.35

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Solution

The fourth proportional to 130,900.61, 180,642.86 and 72,757.35 is: 100,405.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,900.61 : 180,642.86 = 72,757.35 : x
  2. Step 2: Convert to fraction form
    130,900.61/180,642.86 = 72,757.35/x
  3. Step 3: Cross multiply
    130,900.61x = 180,642.86 × 72,757.35
  4. Step 4: Simplify right side
    130,900.61x = 13,143,095,790.02
  5. Step 5: Solve for x
    x = 13,143,095,790.02/130,900.61
  6. Step 6: Final answer
    x = 100,405.15

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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.