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Finding the Fourth Proportional to 218,931.51, 302,125.32 and 118,329.51

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Solution

The fourth proportional to 218,931.51, 302,125.32 and 118,329.51 is: 163,294.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,931.51 : 302,125.32 = 118,329.51 : x
  2. Step 2: Convert to fraction form
    218,931.51/302,125.32 = 118,329.51/x
  3. Step 3: Cross multiply
    218,931.51x = 302,125.32 × 118,329.51
  4. Step 4: Simplify right side
    218,931.51x = 35,750,341,074.19
  5. Step 5: Solve for x
    x = 35,750,341,074.19/218,931.51
  6. Step 6: Final answer
    x = 163,294.64

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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.