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Finding the Fourth Proportional to 103,430.54, 155,154.70 and 28,550.70

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Solution

The fourth proportional to 103,430.54, 155,154.70 and 28,550.70 is: 42,828.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,430.54 : 155,154.70 = 28,550.70 : x
  2. Step 2: Convert to fraction form
    103,430.54/155,154.70 = 28,550.70/x
  3. Step 3: Cross multiply
    103,430.54x = 155,154.70 × 28,550.70
  4. Step 4: Simplify right side
    103,430.54x = 4,429,775,293.29
  5. Step 5: Solve for x
    x = 4,429,775,293.29/103,430.54
  6. Step 6: Final answer
    x = 42,828.50

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1.5x scale

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.