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Finding the Fourth Proportional to 210,571,797.98, 315,886,440.63 and 87,721,385.69

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Solution

The fourth proportional to 210,571,797.98, 315,886,440.63 and 87,721,385.69 is: 131,594,052.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,571,797.98 : 315,886,440.63 = 87,721,385.69 : x
  2. Step 2: Convert to fraction form
    210,571,797.98/315,886,440.63 = 87,721,385.69/x
  3. Step 3: Cross multiply
    210,571,797.98x = 315,886,440.63 × 87,721,385.69
  4. Step 4: Simplify right side
    210,571,797.98x = 27,709,996,291,166,084
  5. Step 5: Solve for x
    x = 27,709,996,291,166,084/210,571,797.98
  6. Step 6: Final answer
    x = 131,594,052.75

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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.