Home / 111,345.50-166,599.74-78,130.38

Finding the Fourth Proportional to 111,345.50, 166,599.74 and 78,130.38

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Solution

The fourth proportional to 111,345.50, 166,599.74 and 78,130.38 is: 116,901.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,345.50 : 166,599.74 = 78,130.38 : x
  2. Step 2: Convert to fraction form
    111,345.50/166,599.74 = 78,130.38/x
  3. Step 3: Cross multiply
    111,345.50x = 166,599.74 × 78,130.38
  4. Step 4: Simplify right side
    111,345.50x = 13,016,500,994.10
  5. Step 5: Solve for x
    x = 13,016,500,994.10/111,345.50
  6. Step 6: Final answer
    x = 116,901.90

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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.