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Finding the Fourth Proportional to 47,290.40, 70,935.60 and 19,210.40

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Solution

The fourth proportional to 47,290.40, 70,935.60 and 19,210.40 is: 28,815.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,290.40 : 70,935.60 = 19,210.40 : x
  2. Step 2: Convert to fraction form
    47,290.40/70,935.60 = 19,210.40/x
  3. Step 3: Cross multiply
    47,290.40x = 70,935.60 × 19,210.40
  4. Step 4: Simplify right side
    47,290.40x = 1,362,701,250.24
  5. Step 5: Solve for x
    x = 1,362,701,250.24/47,290.40
  6. Step 6: Final answer
    x = 28,815.60

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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.