Home / 78,225.21-107,950.32-42,415.11

Finding the Fourth Proportional to 78,225.21, 107,950.32 and 42,415.11

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Solution

The fourth proportional to 78,225.21, 107,950.32 and 42,415.11 is: 58,532.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,225.21 : 107,950.32 = 42,415.11 : x
  2. Step 2: Convert to fraction form
    78,225.21/107,950.32 = 42,415.11/x
  3. Step 3: Cross multiply
    78,225.21x = 107,950.32 × 42,415.11
  4. Step 4: Simplify right side
    78,225.21x = 4,578,724,697.34
  5. Step 5: Solve for x
    x = 4,578,724,697.34/78,225.21
  6. Step 6: Final answer
    x = 58,532.60

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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.