Home / 145,039.02-217,644.80-78,477.81

Finding the Fourth Proportional to 145,039.02, 217,644.80 and 78,477.81

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Solution

The fourth proportional to 145,039.02, 217,644.80 and 78,477.81 is: 117,763.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,039.02 : 217,644.80 = 78,477.81 : x
  2. Step 2: Convert to fraction form
    145,039.02/217,644.80 = 78,477.81/x
  3. Step 3: Cross multiply
    145,039.02x = 217,644.80 × 78,477.81
  4. Step 4: Simplify right side
    145,039.02x = 17,080,286,869.50
  5. Step 5: Solve for x
    x = 17,080,286,869.50/145,039.02
  6. Step 6: Final answer
    x = 117,763.39

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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.