Home / 77,928.60-116,720.10-31,157.40

Finding the Fourth Proportional to 77,928.60, 116,720.10 and 31,157.40

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Solution

The fourth proportional to 77,928.60, 116,720.10 and 31,157.40 is: 46,667.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,928.60 : 116,720.10 = 31,157.40 : x
  2. Step 2: Convert to fraction form
    77,928.60/116,720.10 = 31,157.40/x
  3. Step 3: Cross multiply
    77,928.60x = 116,720.10 × 31,157.40
  4. Step 4: Simplify right side
    77,928.60x = 3,636,694,843.74
  5. Step 5: Solve for x
    x = 3,636,694,843.74/77,928.60
  6. Step 6: Final answer
    x = 46,667.01

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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.