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Finding the Fourth Proportional to 108,861.68, 163,328.88 and 42,303.98

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Solution

The fourth proportional to 108,861.68, 163,328.88 and 42,303.98 is: 63,470.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,861.68 : 163,328.88 = 42,303.98 : x
  2. Step 2: Convert to fraction form
    108,861.68/163,328.88 = 42,303.98/x
  3. Step 3: Cross multiply
    108,861.68x = 163,328.88 × 42,303.98
  4. Step 4: Simplify right side
    108,861.68x = 6,909,461,672.94
  5. Step 5: Solve for x
    x = 6,909,461,672.94/108,861.68
  6. Step 6: Final answer
    x = 63,470.10

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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.