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Finding the Fourth Proportional to 117,070.08, 175,720.32 and 85,816.32

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Solution

The fourth proportional to 117,070.08, 175,720.32 and 85,816.32 is: 128,808.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,070.08 : 175,720.32 = 85,816.32 : x
  2. Step 2: Convert to fraction form
    117,070.08/175,720.32 = 85,816.32/x
  3. Step 3: Cross multiply
    117,070.08x = 175,720.32 × 85,816.32
  4. Step 4: Simplify right side
    117,070.08x = 15,079,671,211.62
  5. Step 5: Solve for x
    x = 15,079,671,211.62/117,070.08
  6. Step 6: Final answer
    x = 128,808.93

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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.