Home / 77,157.86-115,740.75-21,758.18

Finding the Fourth Proportional to 77,157.86, 115,740.75 and 21,758.18

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Solution

The fourth proportional to 77,157.86, 115,740.75 and 21,758.18 is: 32,638.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,157.86 : 115,740.75 = 21,758.18 : x
  2. Step 2: Convert to fraction form
    77,157.86/115,740.75 = 21,758.18/x
  3. Step 3: Cross multiply
    77,157.86x = 115,740.75 × 21,758.18
  4. Step 4: Simplify right side
    77,157.86x = 2,518,308,071.84
  5. Step 5: Solve for x
    x = 2,518,308,071.84/77,157.86
  6. Step 6: Final answer
    x = 32,638.39

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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.