Home / 56,640.08-78,165.32-31,148.40

Finding the Fourth Proportional to 56,640.08, 78,165.32 and 31,148.40

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Solution

The fourth proportional to 56,640.08, 78,165.32 and 31,148.40 is: 42,985.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,640.08 : 78,165.32 = 31,148.40 : x
  2. Step 2: Convert to fraction form
    56,640.08/78,165.32 = 31,148.40/x
  3. Step 3: Cross multiply
    56,640.08x = 78,165.32 × 31,148.40
  4. Step 4: Simplify right side
    56,640.08x = 2,434,724,653.49
  5. Step 5: Solve for x
    x = 2,434,724,653.49/56,640.08
  6. Step 6: Final answer
    x = 42,985.90

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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.