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Finding the Fourth Proportional to 56,706.63, 78,279.39 and 40,364.48

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Solution

The fourth proportional to 56,706.63, 78,279.39 and 40,364.48 is: 55,720.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,706.63 : 78,279.39 = 40,364.48 : x
  2. Step 2: Convert to fraction form
    56,706.63/78,279.39 = 40,364.48/x
  3. Step 3: Cross multiply
    56,706.63x = 78,279.39 × 40,364.48
  4. Step 4: Simplify right side
    56,706.63x = 3,159,706,480.67
  5. Step 5: Solve for x
    x = 3,159,706,480.67/56,706.63
  6. Step 6: Final answer
    x = 55,720.23

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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.