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Finding the Fourth Proportional to 163,480, 243,789.40 and 161,985.28

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Solution

The fourth proportional to 163,480, 243,789.40 and 161,985.28 is: 241,560.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,480 : 243,789.40 = 161,985.28 : x
  2. Step 2: Convert to fraction form
    163,480/243,789.40 = 161,985.28/x
  3. Step 3: Cross multiply
    163,480x = 243,789.40 × 161,985.28
  4. Step 4: Simplify right side
    163,480x = 39,490,294,220.03
  5. Step 5: Solve for x
    x = 39,490,294,220.03/163,480
  6. Step 6: Final answer
    x = 241,560.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.