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Finding the Fourth Proportional to 152,847.72, 210,930.66 and 85,779.72

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Solution

The fourth proportional to 152,847.72, 210,930.66 and 85,779.72 is: 118,376.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,847.72 : 210,930.66 = 85,779.72 : x
  2. Step 2: Convert to fraction form
    152,847.72/210,930.66 = 85,779.72/x
  3. Step 3: Cross multiply
    152,847.72x = 210,930.66 × 85,779.72
  4. Step 4: Simplify right side
    152,847.72x = 18,093,572,954.22
  5. Step 5: Solve for x
    x = 18,093,572,954.22/152,847.72
  6. Step 6: Final answer
    x = 118,376.47

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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.