Home / 90,988,642.80-136,482,964.20-90,421,772.40

Finding the Fourth Proportional to 90,988,642.80, 136,482,964.20 and 90,421,772.40

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Solution

The fourth proportional to 90,988,642.80, 136,482,964.20 and 90,421,772.40 is: 135,632,658.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,988,642.80 : 136,482,964.20 = 90,421,772.40 : x
  2. Step 2: Convert to fraction form
    90,988,642.80/136,482,964.20 = 90,421,772.40/x
  3. Step 3: Cross multiply
    90,988,642.80x = 136,482,964.20 × 90,421,772.40
  4. Step 4: Simplify right side
    90,988,642.80x = 12,341,031,525,369,748
  5. Step 5: Solve for x
    x = 12,341,031,525,369,748/90,988,642.80
  6. Step 6: Final answer
    x = 135,632,658.60

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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.