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Finding the Fourth Proportional to 78,641.77, 108,597.78 and 49,970.89

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Solution

The fourth proportional to 78,641.77, 108,597.78 and 49,970.89 is: 69,005.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,641.77 : 108,597.78 = 49,970.89 : x
  2. Step 2: Convert to fraction form
    78,641.77/108,597.78 = 49,970.89/x
  3. Step 3: Cross multiply
    78,641.77x = 108,597.78 × 49,970.89
  4. Step 4: Simplify right side
    78,641.77x = 5,426,727,718.62
  5. Step 5: Solve for x
    x = 5,426,727,718.62/78,641.77
  6. Step 6: Final answer
    x = 69,005.67

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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.