Home / 158,510.40-218,742.57-86,890.20

Finding the Fourth Proportional to 158,510.40, 218,742.57 and 86,890.20

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Solution

The fourth proportional to 158,510.40, 218,742.57 and 86,890.20 is: 119,907.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,510.40 : 218,742.57 = 86,890.20 : x
  2. Step 2: Convert to fraction form
    158,510.40/218,742.57 = 86,890.20/x
  3. Step 3: Cross multiply
    158,510.40x = 218,742.57 × 86,890.20
  4. Step 4: Simplify right side
    158,510.40x = 19,006,585,655.81
  5. Step 5: Solve for x
    x = 19,006,585,655.81/158,510.40
  6. Step 6: Final answer
    x = 119,907.50

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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.