Home / 85,430.20-128,145.30-32,841.40

Finding the Fourth Proportional to 85,430.20, 128,145.30 and 32,841.40

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Solution

The fourth proportional to 85,430.20, 128,145.30 and 32,841.40 is: 49,262.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,430.20 : 128,145.30 = 32,841.40 : x
  2. Step 2: Convert to fraction form
    85,430.20/128,145.30 = 32,841.40/x
  3. Step 3: Cross multiply
    85,430.20x = 128,145.30 × 32,841.40
  4. Step 4: Simplify right side
    85,430.20x = 4,208,471,055.42
  5. Step 5: Solve for x
    x = 4,208,471,055.42/85,430.20
  6. Step 6: Final answer
    x = 49,262.10

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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.