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Finding the Fourth Proportional to 118,513.21, 163,548.21 and 64,798.21

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Solution

The fourth proportional to 118,513.21, 163,548.21 and 64,798.21 is: 89,421.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,513.21 : 163,548.21 = 64,798.21 : x
  2. Step 2: Convert to fraction form
    118,513.21/163,548.21 = 64,798.21/x
  3. Step 3: Cross multiply
    118,513.21x = 163,548.21 × 64,798.21
  4. Step 4: Simplify right side
    118,513.21x = 10,597,631,256.70
  5. Step 5: Solve for x
    x = 10,597,631,256.70/118,513.21
  6. Step 6: Final answer
    x = 89,421.52

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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.