Home / 130,707.18-180,348.30-85,451.40

Finding the Fourth Proportional to 130,707.18, 180,348.30 and 85,451.40

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Solution

The fourth proportional to 130,707.18, 180,348.30 and 85,451.40 is: 117,904.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,707.18 : 180,348.30 = 85,451.40 : x
  2. Step 2: Convert to fraction form
    130,707.18/180,348.30 = 85,451.40/x
  3. Step 3: Cross multiply
    130,707.18x = 180,348.30 × 85,451.40
  4. Step 4: Simplify right side
    130,707.18x = 15,411,014,722.62
  5. Step 5: Solve for x
    x = 15,411,014,722.62/130,707.18
  6. Step 6: Final answer
    x = 117,904.88

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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.