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Finding the Fourth Proportional to 142,762.86, 197,012.34 and 79,100.64

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Solution

The fourth proportional to 142,762.86, 197,012.34 and 79,100.64 is: 109,158.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,762.86 : 197,012.34 = 79,100.64 : x
  2. Step 2: Convert to fraction form
    142,762.86/197,012.34 = 79,100.64/x
  3. Step 3: Cross multiply
    142,762.86x = 197,012.34 × 79,100.64
  4. Step 4: Simplify right side
    142,762.86x = 15,583,802,181.90
  5. Step 5: Solve for x
    x = 15,583,802,181.90/142,762.86
  6. Step 6: Final answer
    x = 109,158.66

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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.