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Finding the Fourth Proportional to 148,078.30, 221,862.30 and 69,030.40

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Solution

The fourth proportional to 148,078.30, 221,862.30 and 69,030.40 is: 103,426.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,078.30 : 221,862.30 = 69,030.40 : x
  2. Step 2: Convert to fraction form
    148,078.30/221,862.30 = 69,030.40/x
  3. Step 3: Cross multiply
    148,078.30x = 221,862.30 × 69,030.40
  4. Step 4: Simplify right side
    148,078.30x = 15,315,243,313.92
  5. Step 5: Solve for x
    x = 15,315,243,313.92/148,078.30
  6. Step 6: Final answer
    x = 103,426.66

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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.