Home / 428,896,291.68-643,238,149.32-122,191,061.76

Finding the Fourth Proportional to 428,896,291.68, 643,238,149.32 and 122,191,061.76

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Solution

The fourth proportional to 428,896,291.68, 643,238,149.32 and 122,191,061.76 is: 183,256,311.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,896,291.68 : 643,238,149.32 = 122,191,061.76 : x
  2. Step 2: Convert to fraction form
    428,896,291.68/643,238,149.32 = 122,191,061.76/x
  3. Step 3: Cross multiply
    428,896,291.68x = 643,238,149.32 × 122,191,061.76
  4. Step 4: Simplify right side
    428,896,291.68x = 78,597,952,429,948,224
  5. Step 5: Solve for x
    x = 78,597,952,429,948,224/428,896,291.68
  6. Step 6: Final answer
    x = 183,256,311.50

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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.