Home / 78,365.48-108,145.14-42,555.80

Finding the Fourth Proportional to 78,365.48, 108,145.14 and 42,555.80

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Solution

The fourth proportional to 78,365.48, 108,145.14 and 42,555.80 is: 58,727.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,365.48 : 108,145.14 = 42,555.80 : x
  2. Step 2: Convert to fraction form
    78,365.48/108,145.14 = 42,555.80/x
  3. Step 3: Cross multiply
    78,365.48x = 108,145.14 × 42,555.80
  4. Step 4: Simplify right side
    78,365.48x = 4,602,202,948.81
  5. Step 5: Solve for x
    x = 4,602,202,948.81/78,365.48
  6. Step 6: Final answer
    x = 58,727.43

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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.