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Finding the Fourth Proportional to 128,547.61, 177,374.61 and 80,767.13

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Solution

The fourth proportional to 128,547.61, 177,374.61 and 80,767.13 is: 111,445.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,547.61 : 177,374.61 = 80,767.13 : x
  2. Step 2: Convert to fraction form
    128,547.61/177,374.61 = 80,767.13/x
  3. Step 3: Cross multiply
    128,547.61x = 177,374.61 × 80,767.13
  4. Step 4: Simplify right side
    128,547.61x = 14,326,037,297.70
  5. Step 5: Solve for x
    x = 14,326,037,297.70/128,547.61
  6. Step 6: Final answer
    x = 111,445.38

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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.