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Finding the Fourth Proportional to 72,570.89, 100,130.28 and 42,338.96

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Solution

The fourth proportional to 72,570.89, 100,130.28 and 42,338.96 is: 58,417.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,570.89 : 100,130.28 = 42,338.96 : x
  2. Step 2: Convert to fraction form
    72,570.89/100,130.28 = 42,338.96/x
  3. Step 3: Cross multiply
    72,570.89x = 100,130.28 × 42,338.96
  4. Step 4: Simplify right side
    72,570.89x = 4,239,411,419.06
  5. Step 5: Solve for x
    x = 4,239,411,419.06/72,570.89
  6. Step 6: Final answer
    x = 58,417.52

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.