Home / 145,890.32-201,328.61-78,822.32

Finding the Fourth Proportional to 145,890.32, 201,328.61 and 78,822.32

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Solution

The fourth proportional to 145,890.32, 201,328.61 and 78,822.32 is: 108,774.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,890.32 : 201,328.61 = 78,822.32 : x
  2. Step 2: Convert to fraction form
    145,890.32/201,328.61 = 78,822.32/x
  3. Step 3: Cross multiply
    145,890.32x = 201,328.61 × 78,822.32
  4. Step 4: Simplify right side
    145,890.32x = 15,869,186,721.82
  5. Step 5: Solve for x
    x = 15,869,186,721.82/145,890.32
  6. Step 6: Final answer
    x = 108,774.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.