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Finding the Fourth Proportional to 139,802.61, 192,938.51 and 79,392.20

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Solution

The fourth proportional to 139,802.61, 192,938.51 and 79,392.20 is: 109,567.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,802.61 : 192,938.51 = 79,392.20 : x
  2. Step 2: Convert to fraction form
    139,802.61/192,938.51 = 79,392.20/x
  3. Step 3: Cross multiply
    139,802.61x = 192,938.51 × 79,392.20
  4. Step 4: Simplify right side
    139,802.61x = 15,317,812,646.11
  5. Step 5: Solve for x
    x = 15,317,812,646.11/139,802.61
  6. Step 6: Final answer
    x = 109,567.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.