Home / 78,002.55-107,643.21-42,192.66

Finding the Fourth Proportional to 78,002.55, 107,643.21 and 42,192.66

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Solution

The fourth proportional to 78,002.55, 107,643.21 and 42,192.66 is: 58,225.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,002.55 : 107,643.21 = 42,192.66 : x
  2. Step 2: Convert to fraction form
    78,002.55/107,643.21 = 42,192.66/x
  3. Step 3: Cross multiply
    78,002.55x = 107,643.21 × 42,192.66
  4. Step 4: Simplify right side
    78,002.55x = 4,541,753,360.84
  5. Step 5: Solve for x
    x = 4,541,753,360.84/78,002.55
  6. Step 6: Final answer
    x = 58,225.70

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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.