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Finding the Fourth Proportional to 89,913.80, 134,870.70 and 60,345.80

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Solution

The fourth proportional to 89,913.80, 134,870.70 and 60,345.80 is: 90,518.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,913.80 : 134,870.70 = 60,345.80 : x
  2. Step 2: Convert to fraction form
    89,913.80/134,870.70 = 60,345.80/x
  3. Step 3: Cross multiply
    89,913.80x = 134,870.70 × 60,345.80
  4. Step 4: Simplify right side
    89,913.80x = 8,138,880,288.06
  5. Step 5: Solve for x
    x = 8,138,880,288.06/89,913.80
  6. Step 6: Final answer
    x = 90,518.70

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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.