Home / 103,700.60-155,714.93-78,768.80

Finding the Fourth Proportional to 103,700.60, 155,714.93 and 78,768.80

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Solution

The fourth proportional to 103,700.60, 155,714.93 and 78,768.80 is: 118,277.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,700.60 : 155,714.93 = 78,768.80 : x
  2. Step 2: Convert to fraction form
    103,700.60/155,714.93 = 78,768.80/x
  3. Step 3: Cross multiply
    103,700.60x = 155,714.93 × 78,768.80
  4. Step 4: Simplify right side
    103,700.60x = 12,265,478,178.18
  5. Step 5: Solve for x
    x = 12,265,478,178.18/103,700.60
  6. Step 6: Final answer
    x = 118,277.79

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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.