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Finding the Fourth Proportional to 78,334.40, 117,501.60 and 38,968.40

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Solution

The fourth proportional to 78,334.40, 117,501.60 and 38,968.40 is: 58,452.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,334.40 : 117,501.60 = 38,968.40 : x
  2. Step 2: Convert to fraction form
    78,334.40/117,501.60 = 38,968.40/x
  3. Step 3: Cross multiply
    78,334.40x = 117,501.60 × 38,968.40
  4. Step 4: Simplify right side
    78,334.40x = 4,578,849,349.44
  5. Step 5: Solve for x
    x = 4,578,849,349.44/78,334.40
  6. Step 6: Final answer
    x = 58,452.60

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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.