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Finding the Fourth Proportional to 202,420.56, 279,275.40 and 112,979.28

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Solution

The fourth proportional to 202,420.56, 279,275.40 and 112,979.28 is: 155,875.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,420.56 : 279,275.40 = 112,979.28 : x
  2. Step 2: Convert to fraction form
    202,420.56/279,275.40 = 112,979.28/x
  3. Step 3: Cross multiply
    202,420.56x = 279,275.40 × 112,979.28
  4. Step 4: Simplify right side
    202,420.56x = 31,552,333,613.71
  5. Step 5: Solve for x
    x = 31,552,333,613.71/202,420.56
  6. Step 6: Final answer
    x = 155,875.14

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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.