Home / 78,364.32-117,545.84-31,616.48

Finding the Fourth Proportional to 78,364.32, 117,545.84 and 31,616.48

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Solution

The fourth proportional to 78,364.32, 117,545.84 and 31,616.48 is: 47,424.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,364.32 : 117,545.84 = 31,616.48 : x
  2. Step 2: Convert to fraction form
    78,364.32/117,545.84 = 31,616.48/x
  3. Step 3: Cross multiply
    78,364.32x = 117,545.84 × 31,616.48
  4. Step 4: Simplify right side
    78,364.32x = 3,716,385,699.44
  5. Step 5: Solve for x
    x = 3,716,385,699.44/78,364.32
  6. Step 6: Final answer
    x = 47,424.46

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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.