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Finding the Fourth Proportional to 245,580.28, 368,431.71 and 85,658.50

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Solution

The fourth proportional to 245,580.28, 368,431.71 and 85,658.50 is: 128,509.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,580.28 : 368,431.71 = 85,658.50 : x
  2. Step 2: Convert to fraction form
    245,580.28/368,431.71 = 85,658.50/x
  3. Step 3: Cross multiply
    245,580.28x = 368,431.71 × 85,658.50
  4. Step 4: Simplify right side
    245,580.28x = 31,559,307,631.04
  5. Step 5: Solve for x
    x = 31,559,307,631.04/245,580.28
  6. Step 6: Final answer
    x = 128,509.13

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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.