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Finding the Fourth Proportional to 78,683.96, 118,024.32 and 19,518.96

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Solution

The fourth proportional to 78,683.96, 118,024.32 and 19,518.96 is: 29,278.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,683.96 : 118,024.32 = 19,518.96 : x
  2. Step 2: Convert to fraction form
    78,683.96/118,024.32 = 19,518.96/x
  3. Step 3: Cross multiply
    78,683.96x = 118,024.32 × 19,518.96
  4. Step 4: Simplify right side
    78,683.96x = 2,303,711,981.11
  5. Step 5: Solve for x
    x = 2,303,711,981.11/78,683.96
  6. Step 6: Final answer
    x = 29,278.04

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1.5x scale

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.