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Finding the Fourth Proportional to 280,020.40, 420,030.60 and 93,031.90

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Solution

The fourth proportional to 280,020.40, 420,030.60 and 93,031.90 is: 139,547.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,020.40 : 420,030.60 = 93,031.90 : x
  2. Step 2: Convert to fraction form
    280,020.40/420,030.60 = 93,031.90/x
  3. Step 3: Cross multiply
    280,020.40x = 420,030.60 × 93,031.90
  4. Step 4: Simplify right side
    280,020.40x = 39,076,244,776.14
  5. Step 5: Solve for x
    x = 39,076,244,776.14/280,020.40
  6. Step 6: Final answer
    x = 139,547.85

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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.