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Finding the Fourth Proportional to 118,485.16, 163,509.15 and 64,770.20

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Solution

The fourth proportional to 118,485.16, 163,509.15 and 64,770.20 is: 89,382.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,485.16 : 163,509.15 = 64,770.20 : x
  2. Step 2: Convert to fraction form
    118,485.16/163,509.15 = 64,770.20/x
  3. Step 3: Cross multiply
    118,485.16x = 163,509.15 × 64,770.20
  4. Step 4: Simplify right side
    118,485.16x = 10,590,520,347.33
  5. Step 5: Solve for x
    x = 10,590,520,347.33/118,485.16
  6. Step 6: Final answer
    x = 89,382.67

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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.