Home / 121,001.40-181,502.10-67,638.60

Finding the Fourth Proportional to 121,001.40, 181,502.10 and 67,638.60

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Solution

The fourth proportional to 121,001.40, 181,502.10 and 67,638.60 is: 101,457.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,001.40 : 181,502.10 = 67,638.60 : x
  2. Step 2: Convert to fraction form
    121,001.40/181,502.10 = 67,638.60/x
  3. Step 3: Cross multiply
    121,001.40x = 181,502.10 × 67,638.60
  4. Step 4: Simplify right side
    121,001.40x = 12,276,547,941.06
  5. Step 5: Solve for x
    x = 12,276,547,941.06/121,001.40
  6. Step 6: Final answer
    x = 101,457.90

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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.