Home / 78,637.87-117,386.66-72,784.23

Finding the Fourth Proportional to 78,637.87, 117,386.66 and 72,784.23

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Solution

The fourth proportional to 78,637.87, 117,386.66 and 72,784.23 is: 108,648.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,637.87 : 117,386.66 = 72,784.23 : x
  2. Step 2: Convert to fraction form
    78,637.87/117,386.66 = 72,784.23/x
  3. Step 3: Cross multiply
    78,637.87x = 117,386.66 × 72,784.23
  4. Step 4: Simplify right side
    78,637.87x = 8,543,897,660.37
  5. Step 5: Solve for x
    x = 8,543,897,660.37/78,637.87
  6. Step 6: Final answer
    x = 108,648.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.