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Finding the Fourth Proportional to 201,031.78, 301,547.70 and 53,287.78

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Solution

The fourth proportional to 201,031.78, 301,547.70 and 53,287.78 is: 79,931.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,031.78 : 301,547.70 = 53,287.78 : x
  2. Step 2: Convert to fraction form
    201,031.78/301,547.70 = 53,287.78/x
  3. Step 3: Cross multiply
    201,031.78x = 301,547.70 × 53,287.78
  4. Step 4: Simplify right side
    201,031.78x = 16,068,807,497.11
  5. Step 5: Solve for x
    x = 16,068,807,497.11/201,031.78
  6. Step 6: Final answer
    x = 79,931.68

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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.