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Finding the Fourth Proportional to 103,655.84, 143,113.92 and 79,740.32

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Solution

The fourth proportional to 103,655.84, 143,113.92 and 79,740.32 is: 110,094.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,655.84 : 143,113.92 = 79,740.32 : x
  2. Step 2: Convert to fraction form
    103,655.84/143,113.92 = 79,740.32/x
  3. Step 3: Cross multiply
    103,655.84x = 143,113.92 × 79,740.32
  4. Step 4: Simplify right side
    103,655.84x = 11,411,949,777.25
  5. Step 5: Solve for x
    x = 11,411,949,777.25/103,655.84
  6. Step 6: Final answer
    x = 110,094.61

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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.