Home / 103,206.07-142,430.13-77,666.50

Finding the Fourth Proportional to 103,206.07, 142,430.13 and 77,666.50

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Solution

The fourth proportional to 103,206.07, 142,430.13 and 77,666.50 is: 107,184.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,206.07 : 142,430.13 = 77,666.50 : x
  2. Step 2: Convert to fraction form
    103,206.07/142,430.13 = 77,666.50/x
  3. Step 3: Cross multiply
    103,206.07x = 142,430.13 × 77,666.50
  4. Step 4: Simplify right side
    103,206.07x = 11,062,049,691.65
  5. Step 5: Solve for x
    x = 11,062,049,691.65/103,206.07
  6. Step 6: Final answer
    x = 107,184.10

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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.