Home / 85,909.68-118,285.92-78,036.48

Finding the Fourth Proportional to 85,909.68, 118,285.92 and 78,036.48

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Solution

The fourth proportional to 85,909.68, 118,285.92 and 78,036.48 is: 107,445.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,909.68 : 118,285.92 = 78,036.48 : x
  2. Step 2: Convert to fraction form
    85,909.68/118,285.92 = 78,036.48/x
  3. Step 3: Cross multiply
    85,909.68x = 118,285.92 × 78,036.48
  4. Step 4: Simplify right side
    85,909.68x = 9,230,616,830.36
  5. Step 5: Solve for x
    x = 9,230,616,830.36/85,909.68
  6. Step 6: Final answer
    x = 107,445.60

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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.