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Finding the Fourth Proportional to 74,759,970.80, 112,019,233.80 and 42,315,388.40

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Solution

The fourth proportional to 74,759,970.80, 112,019,233.80 and 42,315,388.40 is: 63,404,751.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,759,970.80 : 112,019,233.80 = 42,315,388.40 : x
  2. Step 2: Convert to fraction form
    74,759,970.80/112,019,233.80 = 42,315,388.40/x
  3. Step 3: Cross multiply
    74,759,970.80x = 112,019,233.80 × 42,315,388.40
  4. Step 4: Simplify right side
    74,759,970.80x = 4,740,137,386,517,408
  5. Step 5: Solve for x
    x = 4,740,137,386,517,408/74,759,970.80
  6. Step 6: Final answer
    x = 63,404,751.71

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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.