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Finding the Fourth Proportional to 103,357.60, 155,018.64 and 28,461.08

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Solution

The fourth proportional to 103,357.60, 155,018.64 and 28,461.08 is: 42,686.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,357.60 : 155,018.64 = 28,461.08 : x
  2. Step 2: Convert to fraction form
    103,357.60/155,018.64 = 28,461.08/x
  3. Step 3: Cross multiply
    103,357.60x = 155,018.64 × 28,461.08
  4. Step 4: Simplify right side
    103,357.60x = 4,411,997,914.53
  5. Step 5: Solve for x
    x = 4,411,997,914.53/103,357.60
  6. Step 6: Final answer
    x = 42,686.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.