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Finding the Fourth Proportional to 68,375,643.60, 102,563,465.40 and 20,506,587.60

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Solution

The fourth proportional to 68,375,643.60, 102,563,465.40 and 20,506,587.60 is: 30,759,881.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,375,643.60 : 102,563,465.40 = 20,506,587.60 : x
  2. Step 2: Convert to fraction form
    68,375,643.60/102,563,465.40 = 20,506,587.60/x
  3. Step 3: Cross multiply
    68,375,643.60x = 102,563,465.40 × 20,506,587.60
  4. Step 4: Simplify right side
    68,375,643.60x = 2,103,226,687,784,669.25
  5. Step 5: Solve for x
    x = 2,103,226,687,784,669.25/68,375,643.60
  6. Step 6: Final answer
    x = 30,759,881.40

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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.