Home / 124,015.20-186,022.80-86,690.40

Finding the Fourth Proportional to 124,015.20, 186,022.80 and 86,690.40

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Solution

The fourth proportional to 124,015.20, 186,022.80 and 86,690.40 is: 130,035.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,015.20 : 186,022.80 = 86,690.40 : x
  2. Step 2: Convert to fraction form
    124,015.20/186,022.80 = 86,690.40/x
  3. Step 3: Cross multiply
    124,015.20x = 186,022.80 × 86,690.40
  4. Step 4: Simplify right side
    124,015.20x = 16,126,390,941.12
  5. Step 5: Solve for x
    x = 16,126,390,941.12/124,015.20
  6. Step 6: Final answer
    x = 130,035.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.