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Finding the Fourth Proportional to 155,420.40, 232,802.55 and 138,799.20

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Solution

The fourth proportional to 155,420.40, 232,802.55 and 138,799.20 is: 207,905.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,420.40 : 232,802.55 = 138,799.20 : x
  2. Step 2: Convert to fraction form
    155,420.40/232,802.55 = 138,799.20/x
  3. Step 3: Cross multiply
    155,420.40x = 232,802.55 × 138,799.20
  4. Step 4: Simplify right side
    155,420.40x = 32,312,807,697.96
  5. Step 5: Solve for x
    x = 32,312,807,697.96/155,420.40
  6. Step 6: Final answer
    x = 207,905.83

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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.