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Finding the Fourth Proportional to 78,627.20, 117,940.80 and 63,075.20

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Solution

The fourth proportional to 78,627.20, 117,940.80 and 63,075.20 is: 94,612.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,627.20 : 117,940.80 = 63,075.20 : x
  2. Step 2: Convert to fraction form
    78,627.20/117,940.80 = 63,075.20/x
  3. Step 3: Cross multiply
    78,627.20x = 117,940.80 × 63,075.20
  4. Step 4: Simplify right side
    78,627.20x = 7,439,139,548.16
  5. Step 5: Solve for x
    x = 7,439,139,548.16/78,627.20
  6. Step 6: Final answer
    x = 94,612.80

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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.