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Finding the Fourth Proportional to 78,970.29, 118,412.05 and 38,901.11

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Solution

The fourth proportional to 78,970.29, 118,412.05 and 38,901.11 is: 58,330.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,970.29 : 118,412.05 = 38,901.11 : x
  2. Step 2: Convert to fraction form
    78,970.29/118,412.05 = 38,901.11/x
  3. Step 3: Cross multiply
    78,970.29x = 118,412.05 × 38,901.11
  4. Step 4: Simplify right side
    78,970.29x = 4,606,359,566.00
  5. Step 5: Solve for x
    x = 4,606,359,566.00/78,970.29
  6. Step 6: Final answer
    x = 58,330.29

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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.