Home / 289,829.10-434,743.65-121,320.30

Finding the Fourth Proportional to 289,829.10, 434,743.65 and 121,320.30

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Solution

The fourth proportional to 289,829.10, 434,743.65 and 121,320.30 is: 181,980.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,829.10 : 434,743.65 = 121,320.30 : x
  2. Step 2: Convert to fraction form
    289,829.10/434,743.65 = 121,320.30/x
  3. Step 3: Cross multiply
    289,829.10x = 434,743.65 × 121,320.30
  4. Step 4: Simplify right side
    289,829.10x = 52,743,230,041.10
  5. Step 5: Solve for x
    x = 52,743,230,041.10/289,829.10
  6. Step 6: Final answer
    x = 181,980.45

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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.