Home / 156,779.78-216,273.16-99,317.72

Finding the Fourth Proportional to 156,779.78, 216,273.16 and 99,317.72

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Solution

The fourth proportional to 156,779.78, 216,273.16 and 99,317.72 is: 137,005.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,779.78 : 216,273.16 = 99,317.72 : x
  2. Step 2: Convert to fraction form
    156,779.78/216,273.16 = 99,317.72/x
  3. Step 3: Cross multiply
    156,779.78x = 216,273.16 × 99,317.72
  4. Step 4: Simplify right side
    156,779.78x = 21,479,757,148.40
  5. Step 5: Solve for x
    x = 21,479,757,148.40/156,779.78
  6. Step 6: Final answer
    x = 137,005.91

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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.