Home / 157,971.84-218,007-86,356.72

Finding the Fourth Proportional to 157,971.84, 218,007 and 86,356.72

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Solution

The fourth proportional to 157,971.84, 218,007 and 86,356.72 is: 119,175.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,971.84 : 218,007 = 86,356.72 : x
  2. Step 2: Convert to fraction form
    157,971.84/218,007 = 86,356.72/x
  3. Step 3: Cross multiply
    157,971.84x = 218,007 × 86,356.72
  4. Step 4: Simplify right side
    157,971.84x = 18,826,369,457.04
  5. Step 5: Solve for x
    x = 18,826,369,457.04/157,971.84
  6. Step 6: Final answer
    x = 119,175.48

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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.