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Finding the Fourth Proportional to 98,430.67, 147,669.52 and 31,870.87

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Solution

The fourth proportional to 98,430.67, 147,669.52 and 31,870.87 is: 47,813.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,430.67 : 147,669.52 = 31,870.87 : x
  2. Step 2: Convert to fraction form
    98,430.67/147,669.52 = 31,870.87/x
  3. Step 3: Cross multiply
    98,430.67x = 147,669.52 × 31,870.87
  4. Step 4: Simplify right side
    98,430.67x = 4,706,356,074.88
  5. Step 5: Solve for x
    x = 4,706,356,074.88/98,430.67
  6. Step 6: Final answer
    x = 47,813.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.