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Finding the Fourth Proportional to 158,681.69, 218,980.72 and 90,700.13

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Solution

The fourth proportional to 158,681.69, 218,980.72 and 90,700.13 is: 125,166.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,681.69 : 218,980.72 = 90,700.13 : x
  2. Step 2: Convert to fraction form
    158,681.69/218,980.72 = 90,700.13/x
  3. Step 3: Cross multiply
    158,681.69x = 218,980.72 × 90,700.13
  4. Step 4: Simplify right side
    158,681.69x = 19,861,579,771.49
  5. Step 5: Solve for x
    x = 19,861,579,771.49/158,681.69
  6. Step 6: Final answer
    x = 125,166.17

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1.5x scale

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.