Home / 109,931.40-151,847.70-81,309.24

Finding the Fourth Proportional to 109,931.40, 151,847.70 and 81,309.24

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Solution

The fourth proportional to 109,931.40, 151,847.70 and 81,309.24 is: 112,312.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,931.40 : 151,847.70 = 81,309.24 : x
  2. Step 2: Convert to fraction form
    109,931.40/151,847.70 = 81,309.24/x
  3. Step 3: Cross multiply
    109,931.40x = 151,847.70 × 81,309.24
  4. Step 4: Simplify right side
    109,931.40x = 12,346,621,082.75
  5. Step 5: Solve for x
    x = 12,346,621,082.75/109,931.40
  6. Step 6: Final answer
    x = 112,312.05

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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.