Home / 131,881.68-181,985.95-77,428.11

Finding the Fourth Proportional to 131,881.68, 181,985.95 and 77,428.11

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Solution

The fourth proportional to 131,881.68, 181,985.95 and 77,428.11 is: 106,844.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,881.68 : 181,985.95 = 77,428.11 : x
  2. Step 2: Convert to fraction form
    131,881.68/181,985.95 = 77,428.11/x
  3. Step 3: Cross multiply
    131,881.68x = 181,985.95 × 77,428.11
  4. Step 4: Simplify right side
    131,881.68x = 14,090,828,498.75
  5. Step 5: Solve for x
    x = 14,090,828,498.75/131,881.68
  6. Step 6: Final answer
    x = 106,844.47

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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.