Home / 289,330.20-433,995.30-78,989.40

Finding the Fourth Proportional to 289,330.20, 433,995.30 and 78,989.40

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Solution

The fourth proportional to 289,330.20, 433,995.30 and 78,989.40 is: 118,484.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,330.20 : 433,995.30 = 78,989.40 : x
  2. Step 2: Convert to fraction form
    289,330.20/433,995.30 = 78,989.40/x
  3. Step 3: Cross multiply
    289,330.20x = 433,995.30 × 78,989.40
  4. Step 4: Simplify right side
    289,330.20x = 34,281,028,349.82
  5. Step 5: Solve for x
    x = 34,281,028,349.82/289,330.20
  6. Step 6: Final answer
    x = 118,484.10

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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.