Home / 134,534.13-185,657.09-77,978.31

Finding the Fourth Proportional to 134,534.13, 185,657.09 and 77,978.31

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Solution

The fourth proportional to 134,534.13, 185,657.09 and 77,978.31 is: 107,610.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,534.13 : 185,657.09 = 77,978.31 : x
  2. Step 2: Convert to fraction form
    134,534.13/185,657.09 = 77,978.31/x
  3. Step 3: Cross multiply
    134,534.13x = 185,657.09 × 77,978.31
  4. Step 4: Simplify right side
    134,534.13x = 14,477,226,117.72
  5. Step 5: Solve for x
    x = 14,477,226,117.72/134,534.13
  6. Step 6: Final answer
    x = 107,610.06

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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.