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Finding the Fourth Proportional to 99,099.40, 136,758.18 and 56,657.32

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Solution

The fourth proportional to 99,099.40, 136,758.18 and 56,657.32 is: 78,187.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,099.40 : 136,758.18 = 56,657.32 : x
  2. Step 2: Convert to fraction form
    99,099.40/136,758.18 = 56,657.32/x
  3. Step 3: Cross multiply
    99,099.40x = 136,758.18 × 56,657.32
  4. Step 4: Simplify right side
    99,099.40x = 7,748,351,966.88
  5. Step 5: Solve for x
    x = 7,748,351,966.88/99,099.40
  6. Step 6: Final answer
    x = 78,187.68

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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.