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Finding the Fourth Proportional to 140,779.09, 211,124.51 and 45,987.67

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Solution

The fourth proportional to 140,779.09, 211,124.51 and 45,987.67 is: 68,967.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,779.09 : 211,124.51 = 45,987.67 : x
  2. Step 2: Convert to fraction form
    140,779.09/211,124.51 = 45,987.67/x
  3. Step 3: Cross multiply
    140,779.09x = 211,124.51 × 45,987.67
  4. Step 4: Simplify right side
    140,779.09x = 9,709,125,289.01
  5. Step 5: Solve for x
    x = 9,709,125,289.01/140,779.09
  6. Step 6: Final answer
    x = 68,967.10

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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.