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Finding the Fourth Proportional to 115,012.80, 158,717.40 and 64,711.80

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Solution

The fourth proportional to 115,012.80, 158,717.40 and 64,711.80 is: 89,302.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,012.80 : 158,717.40 = 64,711.80 : x
  2. Step 2: Convert to fraction form
    115,012.80/158,717.40 = 64,711.80/x
  3. Step 3: Cross multiply
    115,012.80x = 158,717.40 × 64,711.80
  4. Step 4: Simplify right side
    115,012.80x = 10,270,888,645.32
  5. Step 5: Solve for x
    x = 10,270,888,645.32/115,012.80
  6. Step 6: Final answer
    x = 89,302.14

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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.