Home / 81,705.20-122,557.80-46,648.40

Finding the Fourth Proportional to 81,705.20, 122,557.80 and 46,648.40

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Solution

The fourth proportional to 81,705.20, 122,557.80 and 46,648.40 is: 69,972.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,705.20 : 122,557.80 = 46,648.40 : x
  2. Step 2: Convert to fraction form
    81,705.20/122,557.80 = 46,648.40/x
  3. Step 3: Cross multiply
    81,705.20x = 122,557.80 × 46,648.40
  4. Step 4: Simplify right side
    81,705.20x = 5,717,125,277.52
  5. Step 5: Solve for x
    x = 5,717,125,277.52/81,705.20
  6. Step 6: Final answer
    x = 69,972.60

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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.