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Finding the Fourth Proportional to 74,679,938.10, 112,019,907.15 and 74,201,641.20

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Solution

The fourth proportional to 74,679,938.10, 112,019,907.15 and 74,201,641.20 is: 111,302,461.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,679,938.10 : 112,019,907.15 = 74,201,641.20 : x
  2. Step 2: Convert to fraction form
    74,679,938.10/112,019,907.15 = 74,201,641.20/x
  3. Step 3: Cross multiply
    74,679,938.10x = 112,019,907.15 × 74,201,641.20
  4. Step 4: Simplify right side
    74,679,938.10x = 8,312,060,957,601,615
  5. Step 5: Solve for x
    x = 8,312,060,957,601,615/74,679,938.10
  6. Step 6: Final answer
    x = 111,302,461.80

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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.