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Finding the Fourth Proportional to 121,283.60, 181,925.40 and 42,405.80

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Solution

The fourth proportional to 121,283.60, 181,925.40 and 42,405.80 is: 63,608.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,283.60 : 181,925.40 = 42,405.80 : x
  2. Step 2: Convert to fraction form
    121,283.60/181,925.40 = 42,405.80/x
  3. Step 3: Cross multiply
    121,283.60x = 181,925.40 × 42,405.80
  4. Step 4: Simplify right side
    121,283.60x = 7,714,692,127.32
  5. Step 5: Solve for x
    x = 7,714,692,127.32/121,283.60
  6. Step 6: Final answer
    x = 63,608.70

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1.5x scale

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.