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Finding the Fourth Proportional to 130,695.61, 180,415.11 and 88,311.55

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Solution

The fourth proportional to 130,695.61, 180,415.11 and 88,311.55 is: 121,907.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,695.61 : 180,415.11 = 88,311.55 : x
  2. Step 2: Convert to fraction form
    130,695.61/180,415.11 = 88,311.55/x
  3. Step 3: Cross multiply
    130,695.61x = 180,415.11 × 88,311.55
  4. Step 4: Simplify right side
    130,695.61x = 15,932,738,007.52
  5. Step 5: Solve for x
    x = 15,932,738,007.52/130,695.61
  6. Step 6: Final answer
    x = 121,907.22

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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.