Home / 78,639,276.74-117,958,813.04-21,131,549.19

Finding the Fourth Proportional to 78,639,276.74, 117,958,813.04 and 21,131,549.19

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Solution

The fourth proportional to 78,639,276.74, 117,958,813.04 and 21,131,549.19 is: 31,697,296.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,639,276.74 : 117,958,813.04 = 21,131,549.19 : x
  2. Step 2: Convert to fraction form
    78,639,276.74/117,958,813.04 = 21,131,549.19/x
  3. Step 3: Cross multiply
    78,639,276.74x = 117,958,813.04 × 21,131,549.19
  4. Step 4: Simplify right side
    78,639,276.74x = 2,492,652,460,043,116
  5. Step 5: Solve for x
    x = 2,492,652,460,043,116/78,639,276.74
  6. Step 6: Final answer
    x = 31,697,296.36

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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.