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Finding the Fourth Proportional to 206,885.60, 310,328.40 and 147,399.20

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Solution

The fourth proportional to 206,885.60, 310,328.40 and 147,399.20 is: 221,098.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,885.60 : 310,328.40 = 147,399.20 : x
  2. Step 2: Convert to fraction form
    206,885.60/310,328.40 = 147,399.20/x
  3. Step 3: Cross multiply
    206,885.60x = 310,328.40 × 147,399.20
  4. Step 4: Simplify right side
    206,885.60x = 45,742,157,897.28
  5. Step 5: Solve for x
    x = 45,742,157,897.28/206,885.60
  6. Step 6: Final answer
    x = 221,098.80

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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.