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Finding the Fourth Proportional to 74,654.40, 111,981.60 and 65,031.60

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Solution

The fourth proportional to 74,654.40, 111,981.60 and 65,031.60 is: 97,547.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,654.40 : 111,981.60 = 65,031.60 : x
  2. Step 2: Convert to fraction form
    74,654.40/111,981.60 = 65,031.60/x
  3. Step 3: Cross multiply
    74,654.40x = 111,981.60 × 65,031.60
  4. Step 4: Simplify right side
    74,654.40x = 7,282,342,618.56
  5. Step 5: Solve for x
    x = 7,282,342,618.56/74,654.40
  6. Step 6: Final answer
    x = 97,547.40

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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.