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Finding the Fourth Proportional to 121,507.40, 169,716.70 and 121,507.40

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Solution

The fourth proportional to 121,507.40, 169,716.70 and 121,507.40 is: 169,716.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,507.40 : 169,716.70 = 121,507.40 : x
  2. Step 2: Convert to fraction form
    121,507.40/169,716.70 = 121,507.40/x
  3. Step 3: Cross multiply
    121,507.40x = 169,716.70 × 121,507.40
  4. Step 4: Simplify right side
    121,507.40x = 20,621,834,953.58
  5. Step 5: Solve for x
    x = 20,621,834,953.58/121,507.40
  6. Step 6: Final answer
    x = 169,716.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.