Home / 130,498.12-180,162.02-85,915.72

Finding the Fourth Proportional to 130,498.12, 180,162.02 and 85,915.72

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Solution

The fourth proportional to 130,498.12, 180,162.02 and 85,915.72 is: 118,612.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,498.12 : 180,162.02 = 85,915.72 : x
  2. Step 2: Convert to fraction form
    130,498.12/180,162.02 = 85,915.72/x
  3. Step 3: Cross multiply
    130,498.12x = 180,162.02 × 85,915.72
  4. Step 4: Simplify right side
    130,498.12x = 15,478,749,664.95
  5. Step 5: Solve for x
    x = 15,478,749,664.95/130,498.12
  6. Step 6: Final answer
    x = 118,612.82

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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.