Home / 157,569.40-217,526-121,678.84

Finding the Fourth Proportional to 157,569.40, 217,526 and 121,678.84

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Solution

The fourth proportional to 157,569.40, 217,526 and 121,678.84 is: 167,978.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,569.40 : 217,526 = 121,678.84 : x
  2. Step 2: Convert to fraction form
    157,569.40/217,526 = 121,678.84/x
  3. Step 3: Cross multiply
    157,569.40x = 217,526 × 121,678.84
  4. Step 4: Simplify right side
    157,569.40x = 26,468,311,349.84
  5. Step 5: Solve for x
    x = 26,468,311,349.84/157,569.40
  6. Step 6: Final answer
    x = 167,978.75

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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.