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Finding the Fourth Proportional to 108,915.42, 163,383.21 and 42,360.60

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Solution

The fourth proportional to 108,915.42, 163,383.21 and 42,360.60 is: 63,544.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,915.42 : 163,383.21 = 42,360.60 : x
  2. Step 2: Convert to fraction form
    108,915.42/163,383.21 = 42,360.60/x
  3. Step 3: Cross multiply
    108,915.42x = 163,383.21 × 42,360.60
  4. Step 4: Simplify right side
    108,915.42x = 6,921,009,776.81
  5. Step 5: Solve for x
    x = 6,921,009,776.81/108,915.42
  6. Step 6: Final answer
    x = 63,544.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.