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Finding the Fourth Proportional to 161,688, 223,136.32 and 90,068.08

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Solution

The fourth proportional to 161,688, 223,136.32 and 90,068.08 is: 124,297.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,688 : 223,136.32 = 90,068.08 : x
  2. Step 2: Convert to fraction form
    161,688/223,136.32 = 90,068.08/x
  3. Step 3: Cross multiply
    161,688x = 223,136.32 × 90,068.08
  4. Step 4: Simplify right side
    161,688x = 20,097,459,920.67
  5. Step 5: Solve for x
    x = 20,097,459,920.67/161,688
  6. Step 6: Final answer
    x = 124,297.78

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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.