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Finding the Fourth Proportional to 71,985.60, 99,314.64 and 48,127.32

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Solution

The fourth proportional to 71,985.60, 99,314.64 and 48,127.32 is: 66,398.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,985.60 : 99,314.64 = 48,127.32 : x
  2. Step 2: Convert to fraction form
    71,985.60/99,314.64 = 48,127.32/x
  3. Step 3: Cross multiply
    71,985.60x = 99,314.64 × 48,127.32
  4. Step 4: Simplify right side
    71,985.60x = 4,779,747,459.96
  5. Step 5: Solve for x
    x = 4,779,747,459.96/71,985.60
  6. Step 6: Final answer
    x = 66,398.66

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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.