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Finding the Fourth Proportional to 118,705.81, 163,807.56 and 64,980.45

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Solution

The fourth proportional to 118,705.81, 163,807.56 and 64,980.45 is: 89,669.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,705.81 : 163,807.56 = 64,980.45 : x
  2. Step 2: Convert to fraction form
    118,705.81/163,807.56 = 64,980.45/x
  3. Step 3: Cross multiply
    118,705.81x = 163,807.56 × 64,980.45
  4. Step 4: Simplify right side
    118,705.81x = 10,644,288,143.16
  5. Step 5: Solve for x
    x = 10,644,288,143.16/118,705.81
  6. Step 6: Final answer
    x = 89,669.48

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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.