Home / 100,980.16-139,353.29-57,948.18

Finding the Fourth Proportional to 100,980.16, 139,353.29 and 57,948.18

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Solution

The fourth proportional to 100,980.16, 139,353.29 and 57,948.18 is: 79,968.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,980.16 : 139,353.29 = 57,948.18 : x
  2. Step 2: Convert to fraction form
    100,980.16/139,353.29 = 57,948.18/x
  3. Step 3: Cross multiply
    100,980.16x = 139,353.29 × 57,948.18
  4. Step 4: Simplify right side
    100,980.16x = 8,075,269,532.51
  5. Step 5: Solve for x
    x = 8,075,269,532.51/100,980.16
  6. Step 6: Final answer
    x = 79,968.87

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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.