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Finding the Fourth Proportional to 77,008.60, 115,631.70 and 42,016.60

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Solution

The fourth proportional to 77,008.60, 115,631.70 and 42,016.60 is: 63,089.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,008.60 : 115,631.70 = 42,016.60 : x
  2. Step 2: Convert to fraction form
    77,008.60/115,631.70 = 42,016.60/x
  3. Step 3: Cross multiply
    77,008.60x = 115,631.70 × 42,016.60
  4. Step 4: Simplify right side
    77,008.60x = 4,858,450,886.22
  5. Step 5: Solve for x
    x = 4,858,450,886.22/77,008.60
  6. Step 6: Final answer
    x = 63,089.72

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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.