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Finding the Fourth Proportional to 152,812.80, 210,873.60 and 85,743.36

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Solution

The fourth proportional to 152,812.80, 210,873.60 and 85,743.36 is: 118,321.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    152,812.80 : 210,873.60 = 85,743.36 : x
  2. Step 2: Convert to fraction form
    152,812.80/210,873.60 = 85,743.36/x
  3. Step 3: Cross multiply
    152,812.80x = 210,873.60 × 85,743.36
  4. Step 4: Simplify right side
    152,812.80x = 18,081,010,999.30
  5. Step 5: Solve for x
    x = 18,081,010,999.30/152,812.80
  6. Step 6: Final answer
    x = 118,321.31

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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.