Home / 80,983.40-121,475.10-70,615.40

Finding the Fourth Proportional to 80,983.40, 121,475.10 and 70,615.40

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Solution

The fourth proportional to 80,983.40, 121,475.10 and 70,615.40 is: 105,923.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,983.40 : 121,475.10 = 70,615.40 : x
  2. Step 2: Convert to fraction form
    80,983.40/121,475.10 = 70,615.40/x
  3. Step 3: Cross multiply
    80,983.40x = 121,475.10 × 70,615.40
  4. Step 4: Simplify right side
    80,983.40x = 8,578,012,776.54
  5. Step 5: Solve for x
    x = 8,578,012,776.54/80,983.40
  6. Step 6: Final answer
    x = 105,923.10

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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.