Home / 56,811.61-78,541.74-42,639.85

Finding the Fourth Proportional to 56,811.61, 78,541.74 and 42,639.85

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Solution

The fourth proportional to 56,811.61, 78,541.74 and 42,639.85 is: 58,949.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,811.61 : 78,541.74 = 42,639.85 : x
  2. Step 2: Convert to fraction form
    56,811.61/78,541.74 = 42,639.85/x
  3. Step 3: Cross multiply
    56,811.61x = 78,541.74 × 42,639.85
  4. Step 4: Simplify right side
    56,811.61x = 3,349,007,406.43
  5. Step 5: Solve for x
    x = 3,349,007,406.43/56,811.61
  6. Step 6: Final answer
    x = 58,949.35

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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.