Home / 74,172.16-102,359.04-40,641.28

Finding the Fourth Proportional to 74,172.16, 102,359.04 and 40,641.28

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Solution

The fourth proportional to 74,172.16, 102,359.04 and 40,641.28 is: 56,085.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,172.16 : 102,359.04 = 40,641.28 : x
  2. Step 2: Convert to fraction form
    74,172.16/102,359.04 = 40,641.28/x
  3. Step 3: Cross multiply
    74,172.16x = 102,359.04 × 40,641.28
  4. Step 4: Simplify right side
    74,172.16x = 4,160,002,405.17
  5. Step 5: Solve for x
    x = 4,160,002,405.17/74,172.16
  6. Step 6: Final answer
    x = 56,085.77

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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.