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Finding the Fourth Proportional to 88,173, 121,678.74 and 48,429

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Solution

The fourth proportional to 88,173, 121,678.74 and 48,429 is: 66,832.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,173 : 121,678.74 = 48,429 : x
  2. Step 2: Convert to fraction form
    88,173/121,678.74 = 48,429/x
  3. Step 3: Cross multiply
    88,173x = 121,678.74 × 48,429
  4. Step 4: Simplify right side
    88,173x = 5,892,779,699.46
  5. Step 5: Solve for x
    x = 5,892,779,699.46/88,173
  6. Step 6: Final answer
    x = 66,832.02

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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.