Home / 289,417.30-434,167.99-89,753.76

Finding the Fourth Proportional to 289,417.30, 434,167.99 and 89,753.76

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Solution

The fourth proportional to 289,417.30, 434,167.99 and 89,753.76 is: 134,643.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,417.30 : 434,167.99 = 89,753.76 : x
  2. Step 2: Convert to fraction form
    289,417.30/434,167.99 = 89,753.76/x
  3. Step 3: Cross multiply
    289,417.30x = 434,167.99 × 89,753.76
  4. Step 4: Simplify right side
    289,417.30x = 38,968,209,349.76
  5. Step 5: Solve for x
    x = 38,968,209,349.76/289,417.30
  6. Step 6: Final answer
    x = 134,643.68

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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.