Home / 81,837.20-122,755.80-46,780.40

Finding the Fourth Proportional to 81,837.20, 122,755.80 and 46,780.40

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Solution

The fourth proportional to 81,837.20, 122,755.80 and 46,780.40 is: 70,170.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,837.20 : 122,755.80 = 46,780.40 : x
  2. Step 2: Convert to fraction form
    81,837.20/122,755.80 = 46,780.40/x
  3. Step 3: Cross multiply
    81,837.20x = 122,755.80 × 46,780.40
  4. Step 4: Simplify right side
    81,837.20x = 5,742,565,426.32
  5. Step 5: Solve for x
    x = 5,742,565,426.32/81,837.20
  6. Step 6: Final answer
    x = 70,170.60

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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.