Home / 101,780.40-140,457.80-56,461.35

Finding the Fourth Proportional to 101,780.40, 140,457.80 and 56,461.35

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Solution

The fourth proportional to 101,780.40, 140,457.80 and 56,461.35 is: 77,917.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,780.40 : 140,457.80 = 56,461.35 : x
  2. Step 2: Convert to fraction form
    101,780.40/140,457.80 = 56,461.35/x
  3. Step 3: Cross multiply
    101,780.40x = 140,457.80 × 56,461.35
  4. Step 4: Simplify right side
    101,780.40x = 7,930,437,356.31
  5. Step 5: Solve for x
    x = 7,930,437,356.31/101,780.40
  6. Step 6: Final answer
    x = 77,917.14

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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.