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Finding the Fourth Proportional to 68,897,430.60, 103,346,145.90 and 47,072,920.20

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Solution

The fourth proportional to 68,897,430.60, 103,346,145.90 and 47,072,920.20 is: 70,609,380.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,897,430.60 : 103,346,145.90 = 47,072,920.20 : x
  2. Step 2: Convert to fraction form
    68,897,430.60/103,346,145.90 = 47,072,920.20/x
  3. Step 3: Cross multiply
    68,897,430.60x = 103,346,145.90 × 47,072,920.20
  4. Step 4: Simplify right side
    68,897,430.60x = 4,864,804,878,928,258
  5. Step 5: Solve for x
    x = 4,864,804,878,928,258/68,897,430.60
  6. Step 6: Final answer
    x = 70,609,380.30

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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.