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Finding the Fourth Proportional to 180,555.64, 249,142.34 and 99,981.09

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Solution

The fourth proportional to 180,555.64, 249,142.34 and 99,981.09 is: 137,960.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,555.64 : 249,142.34 = 99,981.09 : x
  2. Step 2: Convert to fraction form
    180,555.64/249,142.34 = 99,981.09/x
  3. Step 3: Cross multiply
    180,555.64x = 249,142.34 × 99,981.09
  4. Step 4: Simplify right side
    180,555.64x = 24,909,522,157.98
  5. Step 5: Solve for x
    x = 24,909,522,157.98/180,555.64
  6. Step 6: Final answer
    x = 137,960.37

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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.