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Finding the Fourth Proportional to 156,890.01, 216,509.93 and 85,270.05

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Solution

The fourth proportional to 156,890.01, 216,509.93 and 85,270.05 is: 117,673.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,890.01 : 216,509.93 = 85,270.05 : x
  2. Step 2: Convert to fraction form
    156,890.01/216,509.93 = 85,270.05/x
  3. Step 3: Cross multiply
    156,890.01x = 216,509.93 × 85,270.05
  4. Step 4: Simplify right side
    156,890.01x = 18,461,812,450.01
  5. Step 5: Solve for x
    x = 18,461,812,450.01/156,890.01
  6. Step 6: Final answer
    x = 117,673.60

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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.