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Finding the Fourth Proportional to 72,590.31, 100,165.32 and 42,368.70

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Solution

The fourth proportional to 72,590.31, 100,165.32 and 42,368.70 is: 58,463.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,590.31 : 100,165.32 = 42,368.70 : x
  2. Step 2: Convert to fraction form
    72,590.31/100,165.32 = 42,368.70/x
  3. Step 3: Cross multiply
    72,590.31x = 100,165.32 × 42,368.70
  4. Step 4: Simplify right side
    72,590.31x = 4,243,874,393.48
  5. Step 5: Solve for x
    x = 4,243,874,393.48/72,590.31
  6. Step 6: Final answer
    x = 58,463.37

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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.