Home / 135,139.47-186,511.02-77,777.64

Finding the Fourth Proportional to 135,139.47, 186,511.02 and 77,777.64

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Solution

The fourth proportional to 135,139.47, 186,511.02 and 77,777.64 is: 107,343.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,139.47 : 186,511.02 = 77,777.64 : x
  2. Step 2: Convert to fraction form
    135,139.47/186,511.02 = 77,777.64/x
  3. Step 3: Cross multiply
    135,139.47x = 186,511.02 × 77,777.64
  4. Step 4: Simplify right side
    135,139.47x = 14,506,386,969.59
  5. Step 5: Solve for x
    x = 14,506,386,969.59/135,139.47
  6. Step 6: Final answer
    x = 107,343.82

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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.