Home / 100,341.89-138,368.45-70,116.20

Finding the Fourth Proportional to 100,341.89, 138,368.45 and 70,116.20

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Solution

The fourth proportional to 100,341.89, 138,368.45 and 70,116.20 is: 96,688.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,341.89 : 138,368.45 = 70,116.20 : x
  2. Step 2: Convert to fraction form
    100,341.89/138,368.45 = 70,116.20/x
  3. Step 3: Cross multiply
    100,341.89x = 138,368.45 × 70,116.20
  4. Step 4: Simplify right side
    100,341.89x = 9,701,869,563.31
  5. Step 5: Solve for x
    x = 9,701,869,563.31/100,341.89
  6. Step 6: Final answer
    x = 96,688.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.