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Finding the Fourth Proportional to 78,730.08, 118,111.96 and 28,809.98

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Solution

The fourth proportional to 78,730.08, 118,111.96 and 28,809.98 is: 43,221.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,730.08 : 118,111.96 = 28,809.98 : x
  2. Step 2: Convert to fraction form
    78,730.08/118,111.96 = 28,809.98/x
  3. Step 3: Cross multiply
    78,730.08x = 118,111.96 × 28,809.98
  4. Step 4: Simplify right side
    78,730.08x = 3,402,803,205.36
  5. Step 5: Solve for x
    x = 3,402,803,205.36/78,730.08
  6. Step 6: Final answer
    x = 43,221.13

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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.