Home / 78,320.32-117,597.12-31,664.32

Finding the Fourth Proportional to 78,320.32, 117,597.12 and 31,664.32

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Solution

The fourth proportional to 78,320.32, 117,597.12 and 31,664.32 is: 47,543.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,320.32 : 117,597.12 = 31,664.32 : x
  2. Step 2: Convert to fraction form
    78,320.32/117,597.12 = 31,664.32/x
  3. Step 3: Cross multiply
    78,320.32x = 117,597.12 × 31,664.32
  4. Step 4: Simplify right side
    78,320.32x = 3,723,632,838.76
  5. Step 5: Solve for x
    x = 3,723,632,838.76/78,320.32
  6. Step 6: Final answer
    x = 47,543.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.