Home / 77,980.13-107,612.58-42,170.15

Finding the Fourth Proportional to 77,980.13, 107,612.58 and 42,170.15

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Solution

The fourth proportional to 77,980.13, 107,612.58 and 42,170.15 is: 58,194.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,980.13 : 107,612.58 = 42,170.15 : x
  2. Step 2: Convert to fraction form
    77,980.13/107,612.58 = 42,170.15/x
  3. Step 3: Cross multiply
    77,980.13x = 107,612.58 × 42,170.15
  4. Step 4: Simplify right side
    77,980.13x = 4,538,038,102.42
  5. Step 5: Solve for x
    x = 4,538,038,102.42/77,980.13
  6. Step 6: Final answer
    x = 58,194.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.