Home / 139,036.23-191,862.62-78,603.28

Finding the Fourth Proportional to 139,036.23, 191,862.62 and 78,603.28

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Solution

The fourth proportional to 139,036.23, 191,862.62 and 78,603.28 is: 108,468.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,036.23 : 191,862.62 = 78,603.28 : x
  2. Step 2: Convert to fraction form
    139,036.23/191,862.62 = 78,603.28/x
  3. Step 3: Cross multiply
    139,036.23x = 191,862.62 × 78,603.28
  4. Step 4: Simplify right side
    139,036.23x = 15,081,030,663.48
  5. Step 5: Solve for x
    x = 15,081,030,663.48/139,036.23
  6. Step 6: Final answer
    x = 108,468.35

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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.