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Finding the Fourth Proportional to 72,058.78, 99,442.80 and 45,202.42

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Solution

The fourth proportional to 72,058.78, 99,442.80 and 45,202.42 is: 62,380.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,058.78 : 99,442.80 = 45,202.42 : x
  2. Step 2: Convert to fraction form
    72,058.78/99,442.80 = 45,202.42/x
  3. Step 3: Cross multiply
    72,058.78x = 99,442.80 × 45,202.42
  4. Step 4: Simplify right side
    72,058.78x = 4,495,055,211.58
  5. Step 5: Solve for x
    x = 4,495,055,211.58/72,058.78
  6. Step 6: Final answer
    x = 62,380.40

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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.