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Finding the Fourth Proportional to 108,927.20, 163,390.80 and 71,602.40

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Solution

The fourth proportional to 108,927.20, 163,390.80 and 71,602.40 is: 107,403.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,927.20 : 163,390.80 = 71,602.40 : x
  2. Step 2: Convert to fraction form
    108,927.20/163,390.80 = 71,602.40/x
  3. Step 3: Cross multiply
    108,927.20x = 163,390.80 × 71,602.40
  4. Step 4: Simplify right side
    108,927.20x = 11,699,173,417.92
  5. Step 5: Solve for x
    x = 11,699,173,417.92/108,927.20
  6. Step 6: Final answer
    x = 107,403.60

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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.