Home / 78,416.22-117,587.28-28,461.36

Finding the Fourth Proportional to 78,416.22, 117,587.28 and 28,461.36

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Solution

The fourth proportional to 78,416.22, 117,587.28 and 28,461.36 is: 42,678.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,416.22 : 117,587.28 = 28,461.36 : x
  2. Step 2: Convert to fraction form
    78,416.22/117,587.28 = 28,461.36/x
  3. Step 3: Cross multiply
    78,416.22x = 117,587.28 × 28,461.36
  4. Step 4: Simplify right side
    78,416.22x = 3,346,693,907.50
  5. Step 5: Solve for x
    x = 3,346,693,907.50/78,416.22
  6. Step 6: Final answer
    x = 42,678.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.