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Finding the Fourth Proportional to 245,678.54, 339,032.32 and 138,248.51

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Solution

The fourth proportional to 245,678.54, 339,032.32 and 138,248.51 is: 190,780.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,678.54 : 339,032.32 = 138,248.51 : x
  2. Step 2: Convert to fraction form
    245,678.54/339,032.32 = 138,248.51/x
  3. Step 3: Cross multiply
    245,678.54x = 339,032.32 × 138,248.51
  4. Step 4: Simplify right side
    245,678.54x = 46,870,711,041.06
  5. Step 5: Solve for x
    x = 46,870,711,041.06/245,678.54
  6. Step 6: Final answer
    x = 190,780.65

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1.5x scale

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.