Home / 121,020.80-181,547.40-42,159.20

Finding the Fourth Proportional to 121,020.80, 181,547.40 and 42,159.20

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Solution

The fourth proportional to 121,020.80, 181,547.40 and 42,159.20 is: 63,244.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,020.80 : 181,547.40 = 42,159.20 : x
  2. Step 2: Convert to fraction form
    121,020.80/181,547.40 = 42,159.20/x
  3. Step 3: Cross multiply
    121,020.80x = 181,547.40 × 42,159.20
  4. Step 4: Simplify right side
    121,020.80x = 7,653,893,146.08
  5. Step 5: Solve for x
    x = 7,653,893,146.08/121,020.80
  6. Step 6: Final answer
    x = 63,244.44

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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.