Home / 156,045.90-215,405.55-99,540.30

Finding the Fourth Proportional to 156,045.90, 215,405.55 and 99,540.30

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Solution

The fourth proportional to 156,045.90, 215,405.55 and 99,540.30 is: 137,405.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,045.90 : 215,405.55 = 99,540.30 : x
  2. Step 2: Convert to fraction form
    156,045.90/215,405.55 = 99,540.30/x
  3. Step 3: Cross multiply
    156,045.90x = 215,405.55 × 99,540.30
  4. Step 4: Simplify right side
    156,045.90x = 21,441,533,068.67
  5. Step 5: Solve for x
    x = 21,441,533,068.67/156,045.90
  6. Step 6: Final answer
    x = 137,405.30

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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.