Home / 145,101.85-200,240.55-81,439.65

Finding the Fourth Proportional to 145,101.85, 200,240.55 and 81,439.65

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Solution

The fourth proportional to 145,101.85, 200,240.55 and 81,439.65 is: 112,386.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,101.85 : 200,240.55 = 81,439.65 : x
  2. Step 2: Convert to fraction form
    145,101.85/200,240.55 = 81,439.65/x
  3. Step 3: Cross multiply
    145,101.85x = 200,240.55 × 81,439.65
  4. Step 4: Simplify right side
    145,101.85x = 16,307,520,307.81
  5. Step 5: Solve for x
    x = 16,307,520,307.81/145,101.85
  6. Step 6: Final answer
    x = 112,386.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.