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Finding the Fourth Proportional to 93,069.60, 139,439.70 and 89,986.20

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Solution

The fourth proportional to 93,069.60, 139,439.70 and 89,986.20 is: 134,820.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,069.60 : 139,439.70 = 89,986.20 : x
  2. Step 2: Convert to fraction form
    93,069.60/139,439.70 = 89,986.20/x
  3. Step 3: Cross multiply
    93,069.60x = 139,439.70 × 89,986.20
  4. Step 4: Simplify right side
    93,069.60x = 12,547,648,732.14
  5. Step 5: Solve for x
    x = 12,547,648,732.14/93,069.60
  6. Step 6: Final answer
    x = 134,820.06

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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.