Home / 78,100.04-107,777.90-42,290.16

Finding the Fourth Proportional to 78,100.04, 107,777.90 and 42,290.16

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Solution

The fourth proportional to 78,100.04, 107,777.90 and 42,290.16 is: 58,360.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,100.04 : 107,777.90 = 42,290.16 : x
  2. Step 2: Convert to fraction form
    78,100.04/107,777.90 = 42,290.16/x
  3. Step 3: Cross multiply
    78,100.04x = 107,777.90 × 42,290.16
  4. Step 4: Simplify right side
    78,100.04x = 4,557,944,635.46
  5. Step 5: Solve for x
    x = 4,557,944,635.46/78,100.04
  6. Step 6: Final answer
    x = 58,360.34

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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.