Home / 99,031.40-148,547.10-91,428.20

Finding the Fourth Proportional to 99,031.40, 148,547.10 and 91,428.20

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Solution

The fourth proportional to 99,031.40, 148,547.10 and 91,428.20 is: 137,142.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,031.40 : 148,547.10 = 91,428.20 : x
  2. Step 2: Convert to fraction form
    99,031.40/148,547.10 = 91,428.20/x
  3. Step 3: Cross multiply
    99,031.40x = 148,547.10 × 91,428.20
  4. Step 4: Simplify right side
    99,031.40x = 13,581,393,968.22
  5. Step 5: Solve for x
    x = 13,581,393,968.22/99,031.40
  6. Step 6: Final answer
    x = 137,142.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.