Home / 145,030.20-217,545.30-85,835.40

Finding the Fourth Proportional to 145,030.20, 217,545.30 and 85,835.40

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Solution

The fourth proportional to 145,030.20, 217,545.30 and 85,835.40 is: 128,753.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,030.20 : 217,545.30 = 85,835.40 : x
  2. Step 2: Convert to fraction form
    145,030.20/217,545.30 = 85,835.40/x
  3. Step 3: Cross multiply
    145,030.20x = 217,545.30 × 85,835.40
  4. Step 4: Simplify right side
    145,030.20x = 18,673,087,843.62
  5. Step 5: Solve for x
    x = 18,673,087,843.62/145,030.20
  6. Step 6: Final answer
    x = 128,753.10

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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.