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Finding the Fourth Proportional to 128,653.55, 177,547.55 and 71,292.71

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Solution

The fourth proportional to 128,653.55, 177,547.55 and 71,292.71 is: 98,387.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,653.55 : 177,547.55 = 71,292.71 : x
  2. Step 2: Convert to fraction form
    128,653.55/177,547.55 = 71,292.71/x
  3. Step 3: Cross multiply
    128,653.55x = 177,547.55 × 71,292.71
  4. Step 4: Simplify right side
    128,653.55x = 12,657,845,993.36
  5. Step 5: Solve for x
    x = 12,657,845,993.36/128,653.55
  6. Step 6: Final answer
    x = 98,387.07

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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.