Home / 142,269.86-196,332.01-78,607.21

Finding the Fourth Proportional to 142,269.86, 196,332.01 and 78,607.21

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Solution

The fourth proportional to 142,269.86, 196,332.01 and 78,607.21 is: 108,477.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,269.86 : 196,332.01 = 78,607.21 : x
  2. Step 2: Convert to fraction form
    142,269.86/196,332.01 = 78,607.21/x
  3. Step 3: Cross multiply
    142,269.86x = 196,332.01 × 78,607.21
  4. Step 4: Simplify right side
    142,269.86x = 15,433,110,558.13
  5. Step 5: Solve for x
    x = 15,433,110,558.13/142,269.86
  6. Step 6: Final answer
    x = 108,477.72

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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.