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Finding the Fourth Proportional to 103,784,290.80, 155,676,436.20 and 65,615,017.20

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Solution

The fourth proportional to 103,784,290.80, 155,676,436.20 and 65,615,017.20 is: 98,422,525.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,784,290.80 : 155,676,436.20 = 65,615,017.20 : x
  2. Step 2: Convert to fraction form
    103,784,290.80/155,676,436.20 = 65,615,017.20/x
  3. Step 3: Cross multiply
    103,784,290.80x = 155,676,436.20 × 65,615,017.20
  4. Step 4: Simplify right side
    103,784,290.80x = 10,214,712,038,897,702
  5. Step 5: Solve for x
    x = 10,214,712,038,897,702/103,784,290.80
  6. Step 6: Final answer
    x = 98,422,525.80

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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.