Home / 130,428.07-179,982.09-72,280.90

Finding the Fourth Proportional to 130,428.07, 179,982.09 and 72,280.90

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Solution

The fourth proportional to 130,428.07, 179,982.09 and 72,280.90 is: 99,742.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,428.07 : 179,982.09 = 72,280.90 : x
  2. Step 2: Convert to fraction form
    130,428.07/179,982.09 = 72,280.90/x
  3. Step 3: Cross multiply
    130,428.07x = 179,982.09 × 72,280.90
  4. Step 4: Simplify right side
    130,428.07x = 13,009,267,449.08
  5. Step 5: Solve for x
    x = 13,009,267,449.08/130,428.07
  6. Step 6: Final answer
    x = 99,742.85

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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.