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Finding the Fourth Proportional to 74,759,968.80, 112,019,230.80 and 42,315,386.40

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Solution

The fourth proportional to 74,759,968.80, 112,019,230.80 and 42,315,386.40 is: 63,404,748.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,759,968.80 : 112,019,230.80 = 42,315,386.40 : x
  2. Step 2: Convert to fraction form
    74,759,968.80/112,019,230.80 = 42,315,386.40/x
  3. Step 3: Cross multiply
    74,759,968.80x = 112,019,230.80 × 42,315,386.40
  4. Step 4: Simplify right side
    74,759,968.80x = 4,740,137,035,532,781
  5. Step 5: Solve for x
    x = 4,740,137,035,532,781/74,759,968.80
  6. Step 6: Final answer
    x = 63,404,748.71

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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.