Home / 129,577.05-178,813.04-72,216.63

Finding the Fourth Proportional to 129,577.05, 178,813.04 and 72,216.63

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Solution

The fourth proportional to 129,577.05, 178,813.04 and 72,216.63 is: 99,657.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,577.05 : 178,813.04 = 72,216.63 : x
  2. Step 2: Convert to fraction form
    129,577.05/178,813.04 = 72,216.63/x
  3. Step 3: Cross multiply
    129,577.05x = 178,813.04 × 72,216.63
  4. Step 4: Simplify right side
    129,577.05x = 12,913,274,787.77
  5. Step 5: Solve for x
    x = 12,913,274,787.77/129,577.05
  6. Step 6: Final answer
    x = 99,657.11

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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.