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Finding the Fourth Proportional to 93,031.40, 139,547.10 and 66,787.40

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Solution

The fourth proportional to 93,031.40, 139,547.10 and 66,787.40 is: 100,181.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,031.40 : 139,547.10 = 66,787.40 : x
  2. Step 2: Convert to fraction form
    93,031.40/139,547.10 = 66,787.40/x
  3. Step 3: Cross multiply
    93,031.40x = 139,547.10 × 66,787.40
  4. Step 4: Simplify right side
    93,031.40x = 9,319,987,986.54
  5. Step 5: Solve for x
    x = 9,319,987,986.54/93,031.40
  6. Step 6: Final answer
    x = 100,181.10

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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.