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Finding the Fourth Proportional to 56,859.52, 78,498.30 and 39,428.32

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Solution

The fourth proportional to 56,859.52, 78,498.30 and 39,428.32 is: 54,433.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,859.52 : 78,498.30 = 39,428.32 : x
  2. Step 2: Convert to fraction form
    56,859.52/78,498.30 = 39,428.32/x
  3. Step 3: Cross multiply
    56,859.52x = 78,498.30 × 39,428.32
  4. Step 4: Simplify right side
    56,859.52x = 3,095,056,091.86
  5. Step 5: Solve for x
    x = 3,095,056,091.86/56,859.52
  6. Step 6: Final answer
    x = 54,433.38

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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.