Home / 287,439.05-431,210.55-118,867.86

Finding the Fourth Proportional to 287,439.05, 431,210.55 and 118,867.86

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Solution

The fourth proportional to 287,439.05, 431,210.55 and 118,867.86 is: 178,323.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,439.05 : 431,210.55 = 118,867.86 : x
  2. Step 2: Convert to fraction form
    287,439.05/431,210.55 = 118,867.86/x
  3. Step 3: Cross multiply
    287,439.05x = 431,210.55 × 118,867.86
  4. Step 4: Simplify right side
    287,439.05x = 51,257,075,287.92
  5. Step 5: Solve for x
    x = 51,257,075,287.92/287,439.05
  6. Step 6: Final answer
    x = 178,323.29

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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.