Home / 78,792.85-118,196.61-31,396.51

Finding the Fourth Proportional to 78,792.85, 118,196.61 and 31,396.51

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Solution

The fourth proportional to 78,792.85, 118,196.61 and 31,396.51 is: 47,097.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,792.85 : 118,196.61 = 31,396.51 : x
  2. Step 2: Convert to fraction form
    78,792.85/118,196.61 = 31,396.51/x
  3. Step 3: Cross multiply
    78,792.85x = 118,196.61 × 31,396.51
  4. Step 4: Simplify right side
    78,792.85x = 3,710,961,047.83
  5. Step 5: Solve for x
    x = 3,710,961,047.83/78,792.85
  6. Step 6: Final answer
    x = 47,097.69

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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.