Home / 153,639.63-212,069.55-89,125.17

Finding the Fourth Proportional to 153,639.63, 212,069.55 and 89,125.17

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Solution

The fourth proportional to 153,639.63, 212,069.55 and 89,125.17 is: 123,019.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,639.63 : 212,069.55 = 89,125.17 : x
  2. Step 2: Convert to fraction form
    153,639.63/212,069.55 = 89,125.17/x
  3. Step 3: Cross multiply
    153,639.63x = 212,069.55 × 89,125.17
  4. Step 4: Simplify right side
    153,639.63x = 18,900,734,695.57
  5. Step 5: Solve for x
    x = 18,900,734,695.57/153,639.63
  6. Step 6: Final answer
    x = 123,019.92

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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.