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Finding the Fourth Proportional to 216,890.10, 325,116.45 and 98,646.30

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Solution

The fourth proportional to 216,890.10, 325,116.45 and 98,646.30 is: 147,869.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,890.10 : 325,116.45 = 98,646.30 : x
  2. Step 2: Convert to fraction form
    216,890.10/325,116.45 = 98,646.30/x
  3. Step 3: Cross multiply
    216,890.10x = 325,116.45 × 98,646.30
  4. Step 4: Simplify right side
    216,890.10x = 32,071,534,861.64
  5. Step 5: Solve for x
    x = 32,071,534,861.64/216,890.10
  6. Step 6: Final answer
    x = 147,869.98

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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.