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Finding the Fourth Proportional to 72,170,999.80, 108,256,499.70 and 53,039,123.80

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Solution

The fourth proportional to 72,170,999.80, 108,256,499.70 and 53,039,123.80 is: 79,558,685.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,170,999.80 : 108,256,499.70 = 53,039,123.80 : x
  2. Step 2: Convert to fraction form
    72,170,999.80/108,256,499.70 = 53,039,123.80/x
  3. Step 3: Cross multiply
    72,170,999.80x = 108,256,499.70 × 53,039,123.80
  4. Step 4: Simplify right side
    72,170,999.80x = 5,741,829,889,742,963
  5. Step 5: Solve for x
    x = 5,741,829,889,742,963/72,170,999.80
  6. Step 6: Final answer
    x = 79,558,685.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.