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Finding the Fourth Proportional to 43,454,978.70, 65,182,468.05 and 42,783,132.30

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Solution

The fourth proportional to 43,454,978.70, 65,182,468.05 and 42,783,132.30 is: 64,174,698.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,454,978.70 : 65,182,468.05 = 42,783,132.30 : x
  2. Step 2: Convert to fraction form
    43,454,978.70/65,182,468.05 = 42,783,132.30/x
  3. Step 3: Cross multiply
    43,454,978.70x = 65,182,468.05 × 42,783,132.30
  4. Step 4: Simplify right side
    43,454,978.70x = 2,788,710,154,223,672.50
  5. Step 5: Solve for x
    x = 2,788,710,154,223,672.50/43,454,978.70
  6. Step 6: Final answer
    x = 64,174,698.45

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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.