Home / 86,430.09-129,443.67-83,436.87

Finding the Fourth Proportional to 86,430.09, 129,443.67 and 83,436.87

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Solution

The fourth proportional to 86,430.09, 129,443.67 and 83,436.87 is: 124,960.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,430.09 : 129,443.67 = 83,436.87 : x
  2. Step 2: Convert to fraction form
    86,430.09/129,443.67 = 83,436.87/x
  3. Step 3: Cross multiply
    86,430.09x = 129,443.67 × 83,436.87
  4. Step 4: Simplify right side
    86,430.09x = 10,800,374,666.11
  5. Step 5: Solve for x
    x = 10,800,374,666.11/86,430.09
  6. Step 6: Final answer
    x = 124,960.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.