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Finding the Fourth Proportional to 256,656.99, 384,856.98 and 79,140.93

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Solution

The fourth proportional to 256,656.99, 384,856.98 and 79,140.93 is: 118,671.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,656.99 : 384,856.98 = 79,140.93 : x
  2. Step 2: Convert to fraction form
    256,656.99/384,856.98 = 79,140.93/x
  3. Step 3: Cross multiply
    256,656.99x = 384,856.98 × 79,140.93
  4. Step 4: Simplify right side
    256,656.99x = 30,457,939,314.19
  5. Step 5: Solve for x
    x = 30,457,939,314.19/256,656.99
  6. Step 6: Final answer
    x = 118,671.77

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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.