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Finding the Fourth Proportional to 139,985.20, 209,686.20 and 116,657.20

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Solution

The fourth proportional to 139,985.20, 209,686.20 and 116,657.20 is: 174,742.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,985.20 : 209,686.20 = 116,657.20 : x
  2. Step 2: Convert to fraction form
    139,985.20/209,686.20 = 116,657.20/x
  3. Step 3: Cross multiply
    139,985.20x = 209,686.20 × 116,657.20
  4. Step 4: Simplify right side
    139,985.20x = 24,461,404,970.64
  5. Step 5: Solve for x
    x = 24,461,404,970.64/139,985.20
  6. Step 6: Final answer
    x = 174,742.79

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1.5x scale

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.