Home / 142,428.90-213,643.35-89,284.80

Finding the Fourth Proportional to 142,428.90, 213,643.35 and 89,284.80

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Solution

The fourth proportional to 142,428.90, 213,643.35 and 89,284.80 is: 133,927.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,428.90 : 213,643.35 = 89,284.80 : x
  2. Step 2: Convert to fraction form
    142,428.90/213,643.35 = 89,284.80/x
  3. Step 3: Cross multiply
    142,428.90x = 213,643.35 × 89,284.80
  4. Step 4: Simplify right side
    142,428.90x = 19,075,103,776.08
  5. Step 5: Solve for x
    x = 19,075,103,776.08/142,428.90
  6. Step 6: Final answer
    x = 133,927.20

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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.