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Finding the Fourth Proportional to 39,172,353.40, 54,897,981.80 and 39,172,353.40

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Solution

The fourth proportional to 39,172,353.40, 54,897,981.80 and 39,172,353.40 is: 54,897,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,172,353.40 : 54,897,981.80 = 39,172,353.40 : x
  2. Step 2: Convert to fraction form
    39,172,353.40/54,897,981.80 = 39,172,353.40/x
  3. Step 3: Cross multiply
    39,172,353.40x = 54,897,981.80 × 39,172,353.40
  4. Step 4: Simplify right side
    39,172,353.40x = 2,150,483,144,016,368
  5. Step 5: Solve for x
    x = 2,150,483,144,016,368/39,172,353.40
  6. Step 6: Final answer
    x = 54,897,981.80

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.