Home / 81,455.32-112,329.59-57,248.47

Finding the Fourth Proportional to 81,455.32, 112,329.59 and 57,248.47

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Solution

The fourth proportional to 81,455.32, 112,329.59 and 57,248.47 is: 78,947.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,455.32 : 112,329.59 = 57,248.47 : x
  2. Step 2: Convert to fraction form
    81,455.32/112,329.59 = 57,248.47/x
  3. Step 3: Cross multiply
    81,455.32x = 112,329.59 × 57,248.47
  4. Step 4: Simplify right side
    81,455.32x = 6,430,697,017.40
  5. Step 5: Solve for x
    x = 6,430,697,017.40/81,455.32
  6. Step 6: Final answer
    x = 78,947.54

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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.