Home / 99,316.08-137,072.64-72,547.20

Finding the Fourth Proportional to 99,316.08, 137,072.64 and 72,547.20

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Solution

The fourth proportional to 99,316.08, 137,072.64 and 72,547.20 is: 100,127.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,316.08 : 137,072.64 = 72,547.20 : x
  2. Step 2: Convert to fraction form
    99,316.08/137,072.64 = 72,547.20/x
  3. Step 3: Cross multiply
    99,316.08x = 137,072.64 × 72,547.20
  4. Step 4: Simplify right side
    99,316.08x = 9,944,236,228.61
  5. Step 5: Solve for x
    x = 9,944,236,228.61/99,316.08
  6. Step 6: Final answer
    x = 100,127.15

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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.