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Finding the Fourth Proportional to 130,763.61, 180,472.64 and 72,633.61

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Solution

The fourth proportional to 130,763.61, 180,472.64 and 72,633.61 is: 100,244.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,763.61 : 180,472.64 = 72,633.61 : x
  2. Step 2: Convert to fraction form
    130,763.61/180,472.64 = 72,633.61/x
  3. Step 3: Cross multiply
    130,763.61x = 180,472.64 × 72,633.61
  4. Step 4: Simplify right side
    130,763.61x = 13,108,378,447.07
  5. Step 5: Solve for x
    x = 13,108,378,447.07/130,763.61
  6. Step 6: Final answer
    x = 100,244.85

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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.