Home / 156,790.46-216,368.78-85,172.78

Finding the Fourth Proportional to 156,790.46, 216,368.78 and 85,172.78

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Solution

The fourth proportional to 156,790.46, 216,368.78 and 85,172.78 is: 117,537.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,790.46 : 216,368.78 = 85,172.78 : x
  2. Step 2: Convert to fraction form
    156,790.46/216,368.78 = 85,172.78/x
  3. Step 3: Cross multiply
    156,790.46x = 216,368.78 × 85,172.78
  4. Step 4: Simplify right side
    156,790.46x = 18,428,730,497.81
  5. Step 5: Solve for x
    x = 18,428,730,497.81/156,790.46
  6. Step 6: Final answer
    x = 117,537.32

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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.