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Finding the Fourth Proportional to 74,759,950.80, 112,019,203.80 and 42,315,368.40

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Solution

The fourth proportional to 74,759,950.80, 112,019,203.80 and 42,315,368.40 is: 63,404,721.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,759,950.80 : 112,019,203.80 = 42,315,368.40 : x
  2. Step 2: Convert to fraction form
    74,759,950.80/112,019,203.80 = 42,315,368.40/x
  3. Step 3: Cross multiply
    74,759,950.80x = 112,019,203.80 × 42,315,368.40
  4. Step 4: Simplify right side
    74,759,950.80x = 4,740,133,876,671,680
  5. Step 5: Solve for x
    x = 4,740,133,876,671,680/74,759,950.80
  6. Step 6: Final answer
    x = 63,404,721.73

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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.