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Finding the Fourth Proportional to 315,681.33, 435,633.08 and 172,442.01

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Solution

The fourth proportional to 315,681.33, 435,633.08 and 172,442.01 is: 237,966.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,681.33 : 435,633.08 = 172,442.01 : x
  2. Step 2: Convert to fraction form
    315,681.33/435,633.08 = 172,442.01/x
  3. Step 3: Cross multiply
    315,681.33x = 435,633.08 × 172,442.01
  4. Step 4: Simplify right side
    315,681.33x = 75,121,443,075.48
  5. Step 5: Solve for x
    x = 75,121,443,075.48/315,681.33
  6. Step 6: Final answer
    x = 237,966.06

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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.