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Finding the Fourth Proportional to 80,386.40, 120,460.80 and 58,246.40

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Solution

The fourth proportional to 80,386.40, 120,460.80 and 58,246.40 is: 87,283.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,386.40 : 120,460.80 = 58,246.40 : x
  2. Step 2: Convert to fraction form
    80,386.40/120,460.80 = 58,246.40/x
  3. Step 3: Cross multiply
    80,386.40x = 120,460.80 × 58,246.40
  4. Step 4: Simplify right side
    80,386.40x = 7,016,407,941.12
  5. Step 5: Solve for x
    x = 7,016,407,941.12/80,386.40
  6. Step 6: Final answer
    x = 87,283.52

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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.