Home / 130,968.94-180,689.70-85,672.72

Finding the Fourth Proportional to 130,968.94, 180,689.70 and 85,672.72

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Solution

The fourth proportional to 130,968.94, 180,689.70 and 85,672.72 is: 118,197.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,968.94 : 180,689.70 = 85,672.72 : x
  2. Step 2: Convert to fraction form
    130,968.94/180,689.70 = 85,672.72/x
  3. Step 3: Cross multiply
    130,968.94x = 180,689.70 × 85,672.72
  4. Step 4: Simplify right side
    130,968.94x = 15,480,178,074.98
  5. Step 5: Solve for x
    x = 15,480,178,074.98/130,968.94
  6. Step 6: Final answer
    x = 118,197.32

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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.