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Finding the Fourth Proportional to 53,428.60, 80,142.90 and 49,929.40

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Solution

The fourth proportional to 53,428.60, 80,142.90 and 49,929.40 is: 74,894.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,428.60 : 80,142.90 = 49,929.40 : x
  2. Step 2: Convert to fraction form
    53,428.60/80,142.90 = 49,929.40/x
  3. Step 3: Cross multiply
    53,428.60x = 80,142.90 × 49,929.40
  4. Step 4: Simplify right side
    53,428.60x = 4,001,486,911.26
  5. Step 5: Solve for x
    x = 4,001,486,911.26/53,428.60
  6. Step 6: Final answer
    x = 74,894.10

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1.5x scale

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.