Home / 103,645.74-155,501.28-78,804.66

Finding the Fourth Proportional to 103,645.74, 155,501.28 and 78,804.66

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Solution

The fourth proportional to 103,645.74, 155,501.28 and 78,804.66 is: 118,231.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,645.74 : 155,501.28 = 78,804.66 : x
  2. Step 2: Convert to fraction form
    103,645.74/155,501.28 = 78,804.66/x
  3. Step 3: Cross multiply
    103,645.74x = 155,501.28 × 78,804.66
  4. Step 4: Simplify right side
    103,645.74x = 12,254,225,499.96
  5. Step 5: Solve for x
    x = 12,254,225,499.96/103,645.74
  6. Step 6: Final answer
    x = 118,231.83

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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.