Home / 78,032.18-107,683.60-42,221.40

Finding the Fourth Proportional to 78,032.18, 107,683.60 and 42,221.40

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Solution

The fourth proportional to 78,032.18, 107,683.60 and 42,221.40 is: 58,265.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,032.18 : 107,683.60 = 42,221.40 : x
  2. Step 2: Convert to fraction form
    78,032.18/107,683.60 = 42,221.40/x
  3. Step 3: Cross multiply
    78,032.18x = 107,683.60 × 42,221.40
  4. Step 4: Simplify right side
    78,032.18x = 4,546,552,349.04
  5. Step 5: Solve for x
    x = 4,546,552,349.04/78,032.18
  6. Step 6: Final answer
    x = 58,265.09

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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.