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Finding the Fourth Proportional to 77,780.40, 116,670.60 and 69,615.60

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Solution

The fourth proportional to 77,780.40, 116,670.60 and 69,615.60 is: 104,423.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,780.40 : 116,670.60 = 69,615.60 : x
  2. Step 2: Convert to fraction form
    77,780.40/116,670.60 = 69,615.60/x
  3. Step 3: Cross multiply
    77,780.40x = 116,670.60 × 69,615.60
  4. Step 4: Simplify right side
    77,780.40x = 8,122,093,821.36
  5. Step 5: Solve for x
    x = 8,122,093,821.36/77,780.40
  6. Step 6: Final answer
    x = 104,423.40

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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.