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Finding the Fourth Proportional to 86,316, 128,868.51 and 73,033.56

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Solution

The fourth proportional to 86,316, 128,868.51 and 73,033.56 is: 109,038.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,316 : 128,868.51 = 73,033.56 : x
  2. Step 2: Convert to fraction form
    86,316/128,868.51 = 73,033.56/x
  3. Step 3: Cross multiply
    86,316x = 128,868.51 × 73,033.56
  4. Step 4: Simplify right side
    86,316x = 9,411,726,057.20
  5. Step 5: Solve for x
    x = 9,411,726,057.20/86,316
  6. Step 6: Final answer
    x = 109,038.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.