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Finding the Fourth Proportional to 121,275.60, 181,870.20 and 42,392.40

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Solution

The fourth proportional to 121,275.60, 181,870.20 and 42,392.40 is: 63,573.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,275.60 : 181,870.20 = 42,392.40 : x
  2. Step 2: Convert to fraction form
    121,275.60/181,870.20 = 42,392.40/x
  3. Step 3: Cross multiply
    121,275.60x = 181,870.20 × 42,392.40
  4. Step 4: Simplify right side
    121,275.60x = 7,709,914,266.48
  5. Step 5: Solve for x
    x = 7,709,914,266.48/121,275.60
  6. Step 6: Final answer
    x = 63,573.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.