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Finding the Fourth Proportional to 48,386.70, 72,470.70 and 28,703.70

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Solution

The fourth proportional to 48,386.70, 72,470.70 and 28,703.70 is: 42,990.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,386.70 : 72,470.70 = 28,703.70 : x
  2. Step 2: Convert to fraction form
    48,386.70/72,470.70 = 28,703.70/x
  3. Step 3: Cross multiply
    48,386.70x = 72,470.70 × 28,703.70
  4. Step 4: Simplify right side
    48,386.70x = 2,080,177,231.59
  5. Step 5: Solve for x
    x = 2,080,177,231.59/48,386.70
  6. Step 6: Final answer
    x = 42,990.68

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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.