Home / 121,312.10-181,968.15-42,434.30

Finding the Fourth Proportional to 121,312.10, 181,968.15 and 42,434.30

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Solution

The fourth proportional to 121,312.10, 181,968.15 and 42,434.30 is: 63,651.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,312.10 : 181,968.15 = 42,434.30 : x
  2. Step 2: Convert to fraction form
    121,312.10/181,968.15 = 42,434.30/x
  3. Step 3: Cross multiply
    121,312.10x = 181,968.15 × 42,434.30
  4. Step 4: Simplify right side
    121,312.10x = 7,721,691,067.55
  5. Step 5: Solve for x
    x = 7,721,691,067.55/121,312.10
  6. Step 6: Final answer
    x = 63,651.45

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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.