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Finding the Fourth Proportional to 99,710.74, 137,595.65 and 61,984.34

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Solution

The fourth proportional to 99,710.74, 137,595.65 and 61,984.34 is: 85,535.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,710.74 : 137,595.65 = 61,984.34 : x
  2. Step 2: Convert to fraction form
    99,710.74/137,595.65 = 61,984.34/x
  3. Step 3: Cross multiply
    99,710.74x = 137,595.65 × 61,984.34
  4. Step 4: Simplify right side
    99,710.74x = 8,528,775,552.12
  5. Step 5: Solve for x
    x = 8,528,775,552.12/99,710.74
  6. Step 6: Final answer
    x = 85,535.17

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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.