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Finding the Fourth Proportional to 72,171,681.60, 108,257,522.40 and 70,045,917.60

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Solution

The fourth proportional to 72,171,681.60, 108,257,522.40 and 70,045,917.60 is: 105,068,876.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,171,681.60 : 108,257,522.40 = 70,045,917.60 : x
  2. Step 2: Convert to fraction form
    72,171,681.60/108,257,522.40 = 70,045,917.60/x
  3. Step 3: Cross multiply
    72,171,681.60x = 108,257,522.40 × 70,045,917.60
  4. Step 4: Simplify right side
    72,171,681.60x = 7,582,997,493,610,554
  5. Step 5: Solve for x
    x = 7,582,997,493,610,554/72,171,681.60
  6. Step 6: Final answer
    x = 105,068,876.40

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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.