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Finding the Fourth Proportional to 78,927.63, 118,299.51 and 28,970.07

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Solution

The fourth proportional to 78,927.63, 118,299.51 and 28,970.07 is: 43,421.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,927.63 : 118,299.51 = 28,970.07 : x
  2. Step 2: Convert to fraction form
    78,927.63/118,299.51 = 28,970.07/x
  3. Step 3: Cross multiply
    78,927.63x = 118,299.51 × 28,970.07
  4. Step 4: Simplify right side
    78,927.63x = 3,427,145,085.67
  5. Step 5: Solve for x
    x = 3,427,145,085.67/78,927.63
  6. Step 6: Final answer
    x = 43,421.36

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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.