Home / 130,521.70-195,782.55-80,439.40

Finding the Fourth Proportional to 130,521.70, 195,782.55 and 80,439.40

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Solution

The fourth proportional to 130,521.70, 195,782.55 and 80,439.40 is: 120,659.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,521.70 : 195,782.55 = 80,439.40 : x
  2. Step 2: Convert to fraction form
    130,521.70/195,782.55 = 80,439.40/x
  3. Step 3: Cross multiply
    130,521.70x = 195,782.55 × 80,439.40
  4. Step 4: Simplify right side
    130,521.70x = 15,748,630,852.47
  5. Step 5: Solve for x
    x = 15,748,630,852.47/130,521.70
  6. Step 6: Final answer
    x = 120,659.10

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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.