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Finding the Fourth Proportional to 74,250.40, 111,364.80 and 21,654.40

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Solution

The fourth proportional to 74,250.40, 111,364.80 and 21,654.40 is: 32,478.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,250.40 : 111,364.80 = 21,654.40 : x
  2. Step 2: Convert to fraction form
    74,250.40/111,364.80 = 21,654.40/x
  3. Step 3: Cross multiply
    74,250.40x = 111,364.80 × 21,654.40
  4. Step 4: Simplify right side
    74,250.40x = 2,411,537,925.12
  5. Step 5: Solve for x
    x = 2,411,537,925.12/74,250.40
  6. Step 6: Final answer
    x = 32,478.45

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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.