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Finding the Fourth Proportional to 239,916.80, 359,806.40 and 71,430.08

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Solution

The fourth proportional to 239,916.80, 359,806.40 and 71,430.08 is: 107,124.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,916.80 : 359,806.40 = 71,430.08 : x
  2. Step 2: Convert to fraction form
    239,916.80/359,806.40 = 71,430.08/x
  3. Step 3: Cross multiply
    239,916.80x = 359,806.40 × 71,430.08
  4. Step 4: Simplify right side
    239,916.80x = 25,700,999,936.51
  5. Step 5: Solve for x
    x = 25,700,999,936.51/239,916.80
  6. Step 6: Final answer
    x = 107,124.64

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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.