Home / 70,590.92-105,890.52-19,985.72

Finding the Fourth Proportional to 70,590.92, 105,890.52 and 19,985.72

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Solution

The fourth proportional to 70,590.92, 105,890.52 and 19,985.72 is: 29,979.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,590.92 : 105,890.52 = 19,985.72 : x
  2. Step 2: Convert to fraction form
    70,590.92/105,890.52 = 19,985.72/x
  3. Step 3: Cross multiply
    70,590.92x = 105,890.52 × 19,985.72
  4. Step 4: Simplify right side
    70,590.92x = 2,116,298,283.37
  5. Step 5: Solve for x
    x = 2,116,298,283.37/70,590.92
  6. Step 6: Final answer
    x = 29,979.75

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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.