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Finding the Fourth Proportional to 118,678.05, 163,770.48 and 64,964.16

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Solution

The fourth proportional to 118,678.05, 163,770.48 and 64,964.16 is: 89,647.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,678.05 : 163,770.48 = 64,964.16 : x
  2. Step 2: Convert to fraction form
    118,678.05/163,770.48 = 64,964.16/x
  3. Step 3: Cross multiply
    118,678.05x = 163,770.48 × 64,964.16
  4. Step 4: Simplify right side
    118,678.05x = 10,639,211,666.00
  5. Step 5: Solve for x
    x = 10,639,211,666.00/118,678.05
  6. Step 6: Final answer
    x = 89,647.68

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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.