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Finding the Fourth Proportional to 124,894.40, 187,341.60 and 72,406.40

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Solution

The fourth proportional to 124,894.40, 187,341.60 and 72,406.40 is: 108,609.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,894.40 : 187,341.60 = 72,406.40 : x
  2. Step 2: Convert to fraction form
    124,894.40/187,341.60 = 72,406.40/x
  3. Step 3: Cross multiply
    124,894.40x = 187,341.60 × 72,406.40
  4. Step 4: Simplify right side
    124,894.40x = 13,564,730,826.24
  5. Step 5: Solve for x
    x = 13,564,730,826.24/124,894.40
  6. Step 6: Final answer
    x = 108,609.60

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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.