Home / 56,783.84-78,360.12-31,290.32

Finding the Fourth Proportional to 56,783.84, 78,360.12 and 31,290.32

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Solution

The fourth proportional to 56,783.84, 78,360.12 and 31,290.32 is: 43,179.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,783.84 : 78,360.12 = 31,290.32 : x
  2. Step 2: Convert to fraction form
    56,783.84/78,360.12 = 31,290.32/x
  3. Step 3: Cross multiply
    56,783.84x = 78,360.12 × 31,290.32
  4. Step 4: Simplify right side
    56,783.84x = 2,451,913,230.04
  5. Step 5: Solve for x
    x = 2,451,913,230.04/56,783.84
  6. Step 6: Final answer
    x = 43,179.77

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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.