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Finding the Fourth Proportional to 99,562.61, 137,386.13 and 61,316.03

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Solution

The fourth proportional to 99,562.61, 137,386.13 and 61,316.03 is: 84,609.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,562.61 : 137,386.13 = 61,316.03 : x
  2. Step 2: Convert to fraction form
    99,562.61/137,386.13 = 61,316.03/x
  3. Step 3: Cross multiply
    99,562.61x = 137,386.13 × 61,316.03
  4. Step 4: Simplify right side
    99,562.61x = 8,423,971,075.15
  5. Step 5: Solve for x
    x = 8,423,971,075.15/99,562.61
  6. Step 6: Final answer
    x = 84,609.79

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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.