Home / 99,765.21-137,699.55-57,348.35

Finding the Fourth Proportional to 99,765.21, 137,699.55 and 57,348.35

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Solution

The fourth proportional to 99,765.21, 137,699.55 and 57,348.35 is: 79,154.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,765.21 : 137,699.55 = 57,348.35 : x
  2. Step 2: Convert to fraction form
    99,765.21/137,699.55 = 57,348.35/x
  3. Step 3: Cross multiply
    99,765.21x = 137,699.55 × 57,348.35
  4. Step 4: Simplify right side
    99,765.21x = 7,896,841,299.74
  5. Step 5: Solve for x
    x = 7,896,841,299.74/99,765.21
  6. Step 6: Final answer
    x = 79,154.26

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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.